For the last month or two I have been having trouble falling asleep, I think I messed up my "internal clock," most days I'm lucky to get 6 hours of sleep on weekdays.
As for diet I try to keep it consistent, here's a typical day for me:
Whey protein shake with fruits and a dash of cinnamon
Nuts as snack during class
Lean beef with some veggies during lunch
A post workout protein shake with some fruits and creatine
Chicken/beef/ or fish with broccoli/spinach or other veggies along with a bowl of rice
Protein shake and ZMA before bed.