if I am shooting a bunch, and dont know what I want to slow down, and what I want to keep normal speed, is it best to shoot 720, 60 and slow down in post? or overcrank and speed up to normal speed when needed?

Slowing in post requires the NLE to interpolate frames, so when you want slow motion it's better to shoot that way. Whether you should shoot everything at 60P will be influenced by the number of cards you have. But I guess you're already aware of those aspects.

Hi Ian,

I agree. I never know when I want slow or fast motion. After Effects works very well for my requirements.