To prepare for food shortages/price increases: I'm buying seeds for things I know I can grow in our garden, and stocking up on one or two of each of the fungicides, pesticides, and soil amendments that we regularly use. I bought 30 pound sacks of rice and beans, two large boxes of shelf stable nutrition shakes, and shelf stable vacuum sealed bread. We're considering buying half a cow with the neighbors, who have a deep freezer. I want to buy a pot plant, it'll probably depend on how much they cost. I already have a good supply of sunflower lecithin so I can make my own edibles.
To prepare for the EPA being gutted or other impacts of climate change: we bought AA and AAA batteries and refilled everything in our bug out bags, including first aid stuff and emergency high calorie food (in case of natural disasters.) We're installing a reverse osmosis filter in the kitchen sink (we're concerned about water safety as there have already been problems in our area due to old infrastructure) and it comes with a storage tank. Made sure we had plenty of candles, matches, flashlights, charcoal, lighters and lighter fluid, and a small grill for outside. Have an adapter for the car so we can plug things in if the power goes out.
To prepare for FDA/insurance/medical issues: We bought extra vitamins, and we're asking our doctors to prescribe as much of our necessary drugs as they are allowed to. I learned how to do all my physical therapy at home and have been collecting home exercise equipment for a while, unrelated to this but I'm grateful to have it all now. We also bought a few large bottles of rubbing alcohol and hydrogen peroxide. We already have a massive collection of OTC meds because I'm chronically ill and use them often. We plan to add a couple extra boxes of the most important stuff the next few grocery trips. Most important for us: painkillers, epi pens, allergy meds, inhalers, hydrocortisone, and diaper rash cream. No baby but it's useful for a lot of skin irritations.
For general preparation: I looked at the labels on all our personal care products (lotion, face wash, etc) and if it's made outside of the U.S. we ordered as much as we could afford, usually 1-2 of each. We're low maintenance so thankfully it wasn't too expensive. New undies for everyone, filters for everything that needs them (furnace, vents, pet fountains, etc.) Made sure we had needles, thread, super glue, duct tape, white vinegar, borax, and a couple things of Dr. Bronner's soap. We're also saving all our glass jars, packaging, etc (thank God we have a garage...) My grandparents lived through the depression and taught me how to make do and mend. That's my mindset right now.
We have a bidet and already buy TP in bulk so I'm not super worried about paper products. All our pets got checkups and boosters. We made appointments to get all our boosters as well (tetanus, covid, flu shot, etc.) We got a pet first aid kit and book. I got some general house stuff like wood filler, wood conditioner, nails, screws, and cleaning supplies. We shop at costco so honestly it's not much more than we usually have in the house.
I might be over prepared but I don't care. We've only spent ~$500 and decided to skip Christmas gifts so thankfully we can afford it. I'm considering a few more things but as it stands I'm feeling prepared.