I cut my own hair and everyone in the family (I've gone to beauty school and worked in a few salons), and curly hair takes a little different approach (the curl by curl thing is best really). I wanted to put layers into my hair to give it some dimension, and the way I did that was I combed all of my hair to the front of my head, made a tight ponytail front and center (like, right above my forehead), then cut where I wanted to. That's the lazy way to get even layers self-cut