Sleep and water intake are massively underrated. I believe I read that the average adult average is between ~6 to 7 hours of sleep a night, which I don’t think is enough. I try to at least achieve 8 with no problem. But more than aiming for the amount of hours of sleep, it really depends on the quality of your sleep. I dream a lot (Most times, I can remember my dreams, which is another good sign), which is a good thing, because that means I’m in the deepest REM cycle possible.
As far as water is concerned, at least 64 ounces a day, most times I can reach near a gallon, but I don’t hit that mark every day. Aside from hydration, water just is that natural detox for your body, provides lubrication for your joints and the list goes on.