See-food diet. Lots of liquid meals too.
Liquid meals often include oats/bananas/protein powder/honey/PB not necessarily all together, but often several from the list.
Blender's a necessary tool.
Past that I eat as much as I can stuff down my face at the dining halls.
I take glutamine and BCAAs during my workout.
I sometimes take Ephedrine to get my CNS ramped up.
Regularly I take Fish Oil.
Multi-vitamin (NOW's Adam).
And other crap I can't remember but I put into my body on a daily basis anyway.
Those are your staples though. I usually stick to taking Glucosamine and MSM only when my joints are really killing me.
Lots of food.
I've got a lightening fast metabolism and see nothing but good things in my performance when I'm fed well. When I'm not it's obvious.