[handedness]

Alternate working either opposing or totally unconnected muscle groups and there's no reason to rest any in between sets, which has the added benefit of turning it into a pretty incredible cardio workout at the same time.

[nostalgiac]

Not entirely true. Once you're at a reasonable strength level simply switching muscle groups will not provide adequate rest for your CNS to perform your sets optimally.

[tarsinge]

Like I said above short rest times are not for powerlifting purposes but works perfectly in higher rep ranges.

This http://borgefagerli.com/myo-reps-in-english/ works very well for me, great results and very short workouts.

[plaguuuuuu]

I usually have a rest between sets cause I'm tired :o