For me, I throw these in when I just don't feel like working out...
My Personal Best workout with Karen Voight (love the music & background)
Wedding workout with Cathe
Ballet Physique - Amped Up
UY - Yin Yoga with Travis
I always feel 'mentally' better after doing any of these workouts. Gotta have an easy day every now and then.
PS - it looks like the Personal Best workout is up for grabs on the 'share the wealth' thread