You want to eat on a consistent basis......don't take in a protein bar all the time, just eat 5-6 several balanced small meals a day. You want to take protein supplementation in the form of whey protein when you wake up in the morning(since you start burning protein storage upon waking), within 45 minutes after you exercise (critical to take in protein during that time period), and also possibly consider soy protein before you go to bed(its a slow release protein, so it will fuel your muscles when you are sleeping). Jamming your body full of protein supplements is really bad on your kidneys, if you follow the above and take in 5-6 balanced meals you will be taking in enough protein to build lean mass. Eat lots of COMPLEX carbs, lean meat (white fish, chicken breast/tenderloins, tuna fish, etc), and vegetables/fruit for an oxygen balance.
I am 5ft 10 and weigh 195lbs, with 8 % body fat.
Heres my diet on a usual school day
Breakfast:
12 Eggs, protein shake with three scoops, wheat toast, grapefruit
Snack
Peanut Butter sandwich on wheat, glass of milk, banana
Lunch:
Tuna Fish sandwich, Salad, water
Snack:
Yogurt, banana
Post lift:
Protein Shake
Snack: 2 chicken breasts, 3 potatoes
Dinner:
4 Fillets of Tilapia, 2 potatoes
PreBedtime:
Soy Protein Shake
Also its crucial you take in water on a consistent basis throughout your day