I waz packin in the womb, I kicked my way out.
Getting fit is very simple though.
Working out:
_do it consistently. 3 or 4 days a week is great
_variation is key. It confuses your muscles, which means greater gains/more weight loss.
Your body is trying to find the routine- if you exercise infrequently, your body says "Damn, that was hard. Thank God I don't have to do that on a regular basis." and you don't see results. If you exercise often, your body says "damn, I'd better speed up his metabolism in order to take in all the nutrients I need for all this work that we're apparently going to be doing", and you lose more weight.
Your body wants to store fat when it can. If you do the same routines-the same type of situps-over and over, your body will get used to it and "even the levels out", which means you'll stop losing fat. If you do 4 different crunch routines every time you're working out, your body will constantly be in Fat Loss Mode, and it can't figure out the correct levels.
Eating:
_drink lots of water. It keeps your system clean and I think it boosts your metabolism
_eat plenty of lean protein like chicken or fish. To gain muscle, your body should be absorbing a gram of protein for every pound of body fat.
_Lay off the breads/pasta, the soda, the simple sugars
Get plenty of sleep