I hit the gym every other day and typically do this:

1 hr intervals on treadmill

200 crunches

3 reps of 10 targeting triceps/biceps/chest/shoulders

1/2 hr stepper

1/2 hr treadmill incline

So far, it has been incredibly successful.

I'm going today and I doubt I'll be able to maintain that typical workout that I posted above. I'm tired today and busy. But anything helps.