I definitely take the approach of trying to fix what goes on inside of me versus what I put on the outside of me when it comes to skincare & physical upkeep. So trying to eat a lot of fruits & veggies and eat healthy in general, having a regular exercise routine, drinking lots of water, etc.. YES to sunscreen as well. For moisturizer, there is a natural body cream I buy in bulk from someone on Etsy (though I may try to make my own in the future) along with whatever lotions people give me as gifts (I'm not too picky on this kind of thing, as long as it keeps my skin from feeling dry & isn't too greasy). I also have a light lip balm addiction, and I've started making my own at home.
For hair, several years back I bought professional hair cutting scissors off of Ebay, and have been cutting it myself since then. I am lucky in that my hair is curly, and so very forgiving in terms of trim length. I also color my hair, though more to add streaks/highlights/have fun with it. I don't care much about covering grays. This is something I do at home, bleach occasionally and color as needed. So much cheaper than a salon. I do buy nicer shampoo to ensure the color stays in as long as possible, but this I pick up in large, cheap bottles from Ross/Marshalls/etc. I did have a friend who colored my hair for a great price for awhile, but she moved to Cleveland and I've simplified my hair routine since then.
I managed to make it to my early thirties before I was informed by someone that I was "supposed" to be shaping my eyebrows. Up until that point I did nothing outside of between the brows. I obliviously thought I just happened to have fuller eyebrows than most other people. Thus entered a brief few years where I went to a brow place to get them done, after which I realized this is something I could very easily do myself, and have been doing my own since then (and with a much less aggressive approach, to minimize the effort & go back to looking more natural).
I've never gotten a mani or a pedi before (honestly the idea of strangers touching my hands or feet that long kinda weirds me out), outside of a friend or two with a gel setup. I have a small collection of nail polish which I use on occasion. I do have a small amount of makeup, which, outside of the occasional lip gloss or eyeliner, I only use when I dress up, which is rarely these days.