Getting my sleep fixed. Specifically: going to sleep at the same time every night, waking up at the same time every morning, cutting out caffeine completely, no or very limited sweets at night. My dad has bad insomnia (and habits) and I had sleep issues myself growing up. If I was late to high school one more time, I would have failed; and then I was late to graduation lol. Now I wake up every morning feeling refreshed and not tired. Every time I wake up before my alarm it's like 10 minutes before it goes off anyway. I set no alarm on the weekends and I wake up at the same time anyway. Caffeine is a shitty thing to get addicted to. You're not a soldier in a watchtower that needs to watch for an invading army every night, cut that shit out!