Get a movie, put it in your VCR/Dvd Player, lay down in front of your TV, and watch it while you work out. Drink Green Tea or water while you do this.
Do Bicycle Crunches until your legs can't take it anymore. While your legs rest, do situps. While your stomach rests, lift weights.
The best way is to benchpress a very light load. Say 20 pounds. It's very easy at first, very easy. Later on though, it will be straining your arms like hell. The more you move your arms though, the better it helps your muscles.
It is much better to lift light weights many times than heavy weights a few times.
You can repeat this until the movie is over, because you keep letting your body rest!
Better than any workout routine out there!