Just had a baby 4 months old.. looking for a good workout dvd and/or dietary pills?

Can anyone recommend a good workout dvd that does not require a whole lot of time but is good enough for you to be able to tell the difference.. I still have about 30-40 pounds of baby fat to lose. I have looked into Denise Austin, Dallas Cowboys hot bod & the biggest loser boot camp but they all pretty much look the same and I am not sure which one works best so if anybody has any advice I would greatly appreciate it. Also.. I was thinking about a dietary supplement pills to help.. maybe the stacker? Anybody tried these? Thanks!