Get every single punch!
If you’re shooting a fight scene, get a lot of coverage. A lot. Every possible angle you can. Overshoot.
Maybe even a few takes on slow shutter speed to give you blurry motiony stuff. Whatever. Just get a lot.
Your editor will love you for it. If you are your own editor, you’ll love yourself for it. In a good way.
By the way, if you’ve ever taken our workshops, we totally cheat on this — we’re trying to get so much footage in so little time that we usually only take a master shot. This is not very wise and it does ding us on occasion.