Jillian Michael's 30 Day Shred works, makes you feel and look great and strong, and you can do it in 25 minutes a day (including warm up and warm down) in your own house. All you need is some hand weights. It's pretty cheap to buy in shops, but I think it's also on the torrents as well.

Here's Level 1 on youtube if you want to see what it's like: http://www.youtube.com/watch?v=1Pc-NizMgg8

(If you get done with this, I can also recommend Jillian Michael's Ripped in 30)