NONE.
Working out is great. I do it, but it is NOT the way to lose weight. Weight loss has to be about eating if it is going to be sustainable and it has to be EASY if it is going to work. My plan does both. Workouts do niether.
If you're really interested in losing weight as fast as possible while keeping it off, I explain why and how my weight loss program works in my new weight loss and diet program.