tl;dr: He has to start taking better care of himself. There are a lot of things you can get away with when you're 23 that you can't get away with when you're

tl;dr: He has to start taking better care of himself. There are a lot of things you can get away with when you're 23 that you can't get away with when you're 33. As you noted, sleep is the biggest thing. It will help with the stress and memory.