If you follow me on twitter, you know I recently acquire this little DVD by our good friend Bethenny:

I really enjoy doing yoga as a workout and this DVD is super fantastic!  The yoga section is 40 minutes, and as Bethenny says in the video, it is a very compact and efficient workout.  Afterwards I feel like I really worked out and I feel very refreshed.  There are two bonus sections, strength training for 10 minutes and booty bonus for 5 min, which admittedly I haven't tried yet but I like the option of switching up the workout, or maybe doing those two as quick bit of exercise when you're pressed for time.