Some new exercises

I watched Jillian Michael's "Last Chance Workout" DVD. It's very much a beginner's workout and won't be challenging for people who are already fit. However, there are two exercises there that I liked and that I think are worth incorporating into a workout:

Staggered pushups, in which one hand is placed more forward than the other
Up and down planks, in which we alternative raise ourselves up on our hands and go down onto our forearms

I also liked the idea of doing certain weight exercises while balancing on one leg. This causes the body to engage more muscles.