I've been cutting my own hair for about two years now. I'm ready to start paying someone to do it, but I have learned some things:
1) Don't be afraid to cut. Errors are rarely as bad as you think they'll be.
2) Don't cut too much at once. Mistakes arise when you think you know what you're doing.
3) When cutting hair that isn't visible, your hands can tell you everything you need to know.
4) Always cut hair while naked.
