Can you give me some tips about your niche hobby?

Ancient coins (2000-1700 years old) are surprisingly common and can be had very cheaply unless you want a specifically rare or perfect one.

I went through most of my life believing that anything older than say 200 years was automatically a museum piece or equivalent. But most museums of ancient history who display ancient coins have multitudes of the displayed coins sitting in storage. The Romans alone minted BILLIONS of coins over the span of the Republic and the Empire (that's over 1000 years of history!) and if even 1% of them survive today, that's still many, many dozens of millions.

For camping, in cold weather switching from being active to resting can be miserably cold. To combat this you can fill a heat tolerant water bottle with some boiled water, wrap it in a shirt or sweater to prevent burning, and put it into your sleeping bag to warm it up quickly. You can also sort of do the reverse for when you wake up. You can put your clothes for the next day in a small bag and sleep with them in your sleeping bag. That way they won't be frigid when you're trying to dress.

Being a DM is not about telling YOUR story, it's about coming together with your players to create a story. So even if you are going off a pre-written campaign or story you created, you are incharge of the story. Let the rule of fun reign. If a battle is taking forever you can cut down the number of enemies or the enemy's abilities. Your in charge and if done right your players don't even know.

Thanks to the internet you also don't even need much. Get your hands on a core book and a dice set used by all is all that you need to play. Sure maps and miniatures are fun but some systems don't need them, some players are perfectly fine with the theatre of the mind play, or some small toys on a self drawn grid on sheet paper can work.

Servers: it doesn't have to be built for the purpose. In a pinch, any PC will do.

Chess: Fried liver attack doesn't work above 700 ELO and is easily countered with a possibility for a smothered mate.

Guitar: Playing 5 minutes every day is better than playing an hour once a week.

The best way to write a good story, for me, is to write a story I want to read. That seems obvious but bear with me. If I plan out all the details, it's like someone spoiled the book for me, I just can't get into it. I have to create characters I'm interested, plunk them in a situation, and just start seeing what happens. I dont fret the little details unless they start getting me into a place I'm not enjoying. Later on I go back to the early parts and tie them together with whatever happened. Done this way, writing a story feels like reading a story, one that is specifically tailored to your own interests (and that none of your friends have read, so they can't talk to you about it)

Don't use thick lube for unresponsive yoyos and vice versa. Thick lube will make an unresponsive yoyo more responsive which you don't want.

And don't stress about playing a soulslike a certain way and don't listen to gatekeeping haters. Play whatever way you want - it's a game after all and you bought it for your pleasure

Just buy a good 3d printer for your first. Sure, it’ll cost money, but the heartache of constant troubleshooting and tweaking can just suck the fun out of the hobby if you just need this print to succeed.

Prusa Mini+ (I think) Bambu A1 Mini (this would be my #1 starter printer before the security updates they done)

Trumpet playing: The room you're playing in really affects the sound you hear. So does your position in that room. If you are having weird issues with pieces you know you can play, try playing in the corner of the rooms, so your playing into the largest physical space possible.

Observing groups is a very useful skill, in minutes you can tell who's where in the hierarchy, what the cliques are, how well they coordinate, how information flows, and where influence springs from.

This let's you not only insert yourself at the right moment, peg, and place for maximum efficacy, but also informs you of barriers, challenges to overcome, and next steps for the group to act better together.

Group dynamics for coaching, creating community, project organisation, and group coaching.

In Magic the Gathering it's usually correct to wait to play instant spells until your opponent's turn, either on their upkeep or end step in most cases. Waiting as long as you can gives you more information to make the best play.

Woodworking

Measure twice cut once is rookie numbers. Measure 10 times, cut a test piece 5 times, measure twice after each, then do your real cut.

This is a bit of an exaggeration, but you get the idea.

Also, measure after each operation to check your work as you go so you can spot mistakes as early as possible. This includes checking for square, doing test fits, and all manner of sanity checks to ensure that your operations are achieving the desired results before you repeat them on other pieces or move on to do more work on those same pieces that may already be ruined or need fixing.

For glue up, always always always dry fit first. Then plan ahead. Put all your clamps on and have them adjusted before you add glue. Once the glue is on the time is short and you need to have everything ready and waiting.

If you use a table saw, take it seriously. Always use your riving knife when possible, be mindful of the control you have over the pieces, use push sticks and sleds and jigs to improve stability and safety, always wear ppe. Check that your blade is aligned to your miter slots and your fence. Having a slight relief angle on your fence can be good, but never have it canted towards the blade. That can be dangerous. Also make a crosscut sled, they’re amazing.

Beware of dust. It causes cancer and it lingers in the air. Wear a respirator and use ventilation when possible.

Make or buy a workbench with a vise and some hold down capabilities. Being able to hold your work easily is a huge benefit.

If you are looking to improve your accuracy and precision, buy a nice hand plane and learn how set it up, sharpen it, and how to use it. They are absolute game changers. Also make or buy a shooting board for it. Also, buy a machinist’s square, a set of feeler gauges, and a nice 36in aluminum straight edge and learn to use them.

Etc

Obviously that’s a lot, and a lot of it it depends on what you’re actually trying to do, but those are all things that have helped me a lot in my journey towards making furniture, picture frames, cutting boards, etc

If you are dungeon mastering I would recommend avoiding the Quantum Ogre as much as possible. The idea here is to use the same encounter depending on whatever decision the party chooses. This is tempting because this reduces prep work and can reuse information. However, if the decision doesn't have any consequence why make the players make this decision? TTRPG are about collaborative story telling so decisions so matter and if they don't why am I even playing. If you want to reduce your prep maybe have the same monsters but at least change the terrain or starting criteria.

If there is decision lead clues about what might be different between the options if it is important decision. These clues might not be obvious but that is what skills checks are for. Make decisions worthwhile so players feel engaged

I learned the hard way when jogging and meeting some friends at the bar that even if it’s plus 20 you should bring a sweater with you, because once you’re done jogging and it gets dark you will be cold from the sweat. I did this one time and everyone else in the bar was just fine with their T shirts and I was SHIVERING with my wife beater on. Kind of embarrassing.

Get a heart rate sensor (wrist or chest) and train by heart rate. Most of your cardio should be heart rate zone 2 on the 5 zone scale. This builds your aerobic capacity with minimal damage and can be done almost indefinitely. Harder efforts do more damage and add recovery time so should be limited to about two a week.

If you’re going slow you’re doing it right, it will suck less, and you’re more likely to continue. Your slow speed will get faster over time.

For Rpg : let the player take the initiative and bring their plot to the table. If they preptge game for you, it's les work as aGM (also no doodle scheduling, use fix dates)

For paragliding : if there is nobody on a flight site do not take off. Most likely you misunderstood something, and the site isn't flyable. Sure if you re very experienced, do hike and fly or do fly on a week day on a small site, it may not apply, but you're able to analyse by yourself

Don't use Sharpies on cheap acrylic paints. They will dry out immediately and be ruined.

When doing snot techniques, 2 studs = 5 plates.

VX hobbyists- I've noticed a lot of people start off by configuring their encabulators with the original series of kleinhoffer cam ratios, trying to get maximum deltas with the least vacuum pressure possible. It's really better to start with dylomatic induction coefficients even if it initially seems more complicated, you'll have an easier time later with the more commonly available j-discs.

People are surprisingly easy to manipulate.

If you ever start playing Warhammer 40k the miniature game and plan on building your own miniatures use magnets on the weapons. A lot of models come with 2 or 3 different weapons that are good for different situations IE better anti tank, fly, infantry ect. Instead of buying the same model 3 times building and painting it you can buy one, attach small magnets to the weapons and the part of the body they attach to, then you can switch them out on the fly. I didn't do that when I started and it gave me a lot of issues with some of the armies I played against.

For indoor rock climbing (probably outdoor as well): you need, at least, two pairs of climbing shoes. One pair will be out for a re-sole and you can use the other. Though, don't buy your own shoes until you are sure you're going to stick with it for a while. No point ending up with used shoes you'll never use again, because you finally decided the sport isn't for you.

flyfishing

be quieter than you think you should

If you're interested in getting into bicycling check if there's a local co-op. A good one will sell you a cheap bike and even let you pay a decent chunk of it in labor of fixing bikes (and learning to fix yours). Not only is this two hobbies for the price of a few drinks, it's also a good way to make friends, build skills, learn good trails, and feel connected to your local community. You also can get cheap used parts. The bikes won't be high end expensive ones, and you may decide some parts are worth paying manufacturer prices for (several used trigger shifters led to me buying new), but when all is said and done they're usually pretty decent bikes. And you can find weird shit you may not have known was a thing.