Long before I became a beauty editor who obsessively tests snail serums, "bulletproof" lipstick and the best eyeliners for my signature cat-eye, I was a blogger who desperately wanted a GHD flat iron.

There’s something about this time of year that brings out an urge to do something dramatic to change up their looks, and it usually starts with the hair. It’s fun and we love it, but then you have to ...