You could try light-weight complexes to warm up, after your warm-up cardio if you prefer to throw that in there to get the blood moving. Use just the bar and do something like:
Clean/press (or snatch)
Start sequence over
Anything would work. You can do something like this or use only a handful of movements, but it would work well. Perhaps add a small amount of weight to the bar each set until you feel ready to go.