How do I use vim registers?

Question

I only know of one instance using registers is via CtrlR* whereby I paste text from a clipboard.

What are other uses of registers?

Answer 1

A cool trick is to use "1p to paste the last delete/change (, and then use . to repeatedly to paste the subsequent deletes. In other words, "1p... is basically equivalent to "1p"2p"3p"4p.

You can use this to reverse-order a handful of lines: ffffdffffdffffdd"1p....