- Have a workout routine, or a couple. You can just do a calisthenics push up one on youtube if you don't have room for equipment. Make yourself jog once or more a week, it'll make you feel good and you'll be glad you accomplished something even if its not far. At the very least try and get out on a walk every day. It'll give you endorphins and a sense of pride.
- Have different hobbies eg. for me I learn piano, play guitar, learning card tricks, video games, working out. Things you can progress at.
- Don't get in a crap sleep cycle where you wake up late and sleep morning.
- Try and accomplish something small every day so you're not stagnant.
- Eat well, or just don't eat like shit or you'll feel like shit.
- Avoid drugs and avoid drinking to excess, it'll throw your chemicals out of whack and make your moods less stable. (Treat your body like crap, feel like crap).
- Have a plan and know where you're going in life at least in the medium term.
- Don't engage with negative people, don't sulk, always be your best self.
- Don't do things that make you dissapointed in yourself, do the opposite.
A bit general near the end but that's mostly how I conquered a 10 year bout of depression so take what you will from those.