If you are looking for a unique type of workout, try a kettlebell workout. The Firm has a good one out and so does Michelle Khai with her Kettlenetics program (she has a 20 minute workout and a 40 minute workout). Im about to start incorporating Kettlenetics to my exercise program to help mix things up a bit.
Jillian Michaels has a good series of workout dvds. I do one of them each day. They are tough, but I love the way I feel afterwards. The best part is that Im able to squeeze in a highly affective workout in a short amount of time (during my son's nap or before he wakes up in the morning.) My favorites are:
30 Day Shred - This dvd includes three complete 20 minute workouts which progress by level of intensity. You start with Level 1 gradually work your way up to Level 3. Tough, but very affective! You will need light hand weights and a mat if working out on a hard surface.
Banish Fat, Boost Metabolism - This 40 minute circuit workout pumps up that heart rate with challenging intervals involving strength,ab work, and cardio.
No More Trouble Zones - This is another 40 minute circuit workout that targets trouble zones like saddle bags, love handles, muffin tops, and wobbly arms. You will need light hand weights and a mat if working out on a hard surface.
Target has a sale going on with Jillian's dvds right now (ends 11/21, I think!). I believe they are all $9 a piece, which is a steal!
Good luck!