In a time crunch, you need to find exercises that work many body parts with one exercise. That is why I am loving this variation on squats I found over at ExerciseTV. It incorporates side bending as well as an overhead press into your basic squat. This means you are not only working your hamstring, quads and glutes (aka your legs and bum), but your obliques (side of your torso) and shoulders as well. Talk about a three for one bonus deal!
The folks at ExerciseTV are so generous for sharing their videos; they even sponsored this post. So grab some hand weights, any style will do. I would start with five pound weights and work up to using eight and then ten pound weights.
You should definitely check out the extensive video library at ExerciseTV. There is no reason to ever be bored with your workout again!