Don't waste your time on a long, boring, mundane workout. Here's an eight-move bodyweight workout that moves fast and targets all the major muscle groups you care about: arms, abs, and butt. It will also get your heart rate up, up, up.
Directions: Complete 15 reps for each of the eight moves. Repeat the cycle again decreasing down to 10 reps per move, then a last cycle for five reps. Not enough of a workout for you? Repeat this 15-10-5 workout one or two more times.