#9. Holding off from trims
As you age, your hair becomes more dry and brittle, leading to more pesky split ends that can make you look older than you really are. Keep up with regular trims to freshen up your ends and keep your hair looking and feeling healthy. The exact amount of time you should wait between trims varies among different hair types and textures—dryer hair requires a little more attention—but the general recommendation is every six to eight weeks.