DIY Scientifically Proven 7 Minute Workout written about in the New York Times here. Or HICT (high intensity circuit training). The article by the American College of Sports Medicine is here. First seen at Sketch 42 here. The exercises should be done in the above order (read the articles about why).
Exercises are performed for 30 seconds, with 10 seconds of transition time between bouts. Total time for the entire circuit workout is approximately 7 minutes. The circuit can be repeated 2 to 3 times.