This might have been one of the most popular hairstyle requests since the Tom Cruise blockbuster hit theaters in 2000. Grow out your hair, but make sure that your hairstylist does not touch the length. This is where “thinning” comes in handy, as it’s your hair’s weight — not length — that needs to be taken care of. If your hairstylist insists on cutting your hair, make sure he or she leaves the length intact and removes the bulk instead. Of course, you need the right hairdresser to know this. And one more tip: don’t wait a year between haircuts.