I like Jillian Michaels 30 Day Shred...but I am a big fan of hers in general. She has a 5 DVD boxset of circuit training workouts which I also really like...each one is about 25-30 minutes long and really effective in my opinion. I bought mine on Amazon, only $25 for 5 DVDs!



Jackie Warner's WorkOut (of that Bravo TV show by the same name) recently came out with a DVD. There are 3 work outs, lower body, abs and upper body, each routine is 20 minutes. Yes I know it's a reality TV show, but she is a good trainer and the workouts are challenging. I'm getting good results doing one or two of her workouts followed by some running on the treadmill.