Listen when the person cutting your hair is asking you a question.
I went in for 2 inches off my hair. My hair is layered - some long layers, some medium length. After cutting the regular part of my hair I get asked "You want 2 inches off the layers too?" Not paying attention, I said I did.
I didn't. I'm trying to grow these stupid layers out.
I now have layers in my hair that start at the middle of my skull - through no fault of the stylist.
It's only hair - it'll grow out. But in the meantime I look like I haven't ever seen a brush because my hair's standing in every direction.