Every time I open the freezer and find a bounty of huckleberries, or bite into a tomato fresh off the vine, or...well...a lot of food prep stuff :)
Mostly though I would say doing some cheap solo travel and living by myself overseas in my early 20's. Taught me how little I can survive on, what I value most, how resilient I can be, how it is okay to ask for help. The ideas and experiences I had basically shaped the whole direction of my life. While I missed out on some prime working years, I still consider it a win.