Cutting out Diet Coke (and artificial sweeteners) has been key for me. I feel much healthier, and my head is clearer. Sugar is next.

One other body hack: my knuckles were starting to ache like I had arthritis. At first I thought it was from programming too much, but then I discovered that peanuts can cause inflammation -- I was eating peanuts all the time as my go-to snack -- I eliminated those and my arthritis symptoms went away within a few days.