Just call me Vidal Sassoon!

So, I've been cutting my own hair for the last three years, due to not being able to afford to get it cut professionally, boredom, and being in possession of my Mum's old hair scissors. When my friend asked me to cut her hair I thought-no problem! I'm a whizz at this (its worth noting that I have never received as many complements about my hair than in the period in which I've been cutting myself), yet it wasn't until I was halfway around her head and there was a pile of hair on her floor that I realised: I haven't a bloody clue what I'm doing! The thing that became glaring obvious to me once there was no going back was: my hair is curly-therefore hides a multitude of sins, my friends is poker straight and unfortunately doesn't!