I love to mix two Cathe workouts together. Sometimes I'll do all cardio and then UB weight work. Other times I'll do some cardio, then some UB weights, then back to cardio, then back to weights, etc. Really mixes it up and makes it seem like all new workouts. I do workout over an hour M, W, F because I ride horses T, Th, and Sat. Here are a few of my favorites combos:
Low Impact Challenge (PM 5) with Body Max UB
All Out Low Impact Hiit (floor and step PM) with Max Intensity Strength UB
After Burn Express PM with Muscle Max UB
Cardio Super Sets with High Step Training Advanced UB PM
Super Cuts with STS Total Body UB
X-10 X-41 (Low Impact and Fat Blasting) with High Reps UB
Slide and Glide cardio with Flex Train
To the Max with Power Hour UB
Cardio Core Circuits with Super Sets UB
Circuit Blast with Body Max 2 UB
Cross Fire Less Impact with Push Pull
Athletic Training (first part) with Pyramid UB
X-10 Double Low Impact with Gym Styles (both discs time saver PMs)
Anyway, you get the idea. I love working out this way. Cathe could never have enough circuits and total body workouts for me. Be sure to list others that you do to give us some other ideas! Have fun.