Without a doubt Personal Training With Jackie: Power Circuit Training is my favorite for strength training. As for more cardioish exercise Leslie Sansone: Walk Weightloss Bootcamp is my favorite although I will warn you it's pretty intense so if you aren't in the best shape you may want to start off with her 5 Mile Fat Burning Walk. Sansone is great because she explains things very well and keeps it simple/fun but intense and Jackie Warner is just amazing in general.