I'm always looking for new workout routines to change up my workouts so that my body doesn't get "used" to anything and plateau.  I love BodyRock.tv videos because the trainers in the videos work really hard. Normally I'm not able to do most of their routines...yet..but they have a newer series called HiitLite which is lower intensity training than they're normally working out to but it still brings the burn.  If you're looking for a quick workout to add a lil' somethin' somethin' to your routine, check out this video (below).  BodyRock has a new site, new videos on Daily Hiit which is an awesome free resource, definitely worth checking out!