Being in good physical shape is the best way to combat depression. You just have endorphins running around your body. It is the best anti-depressive that there is.
I surprised myself with my ability to run. It's kind of like tippy toe running. I would not be able to outrun Indominus Rex, but with enough practice I might be able to make it 40 or 50 feet before I was killed.
I have a lot of plants and fish and a pet lizard and Venus flytraps. I have a whole ecosystem in my room, like a running waterfall and different lights and sensors set on digital timers.