Don't: Stick Straight Hair
Poker-straight hair may be trendy, but if you don't have a long, slim, oval-shaped face, the flat iron is your enemy. Long tresses that fall straight and close to your head can actually make your head look small and your face look heavy. Like we said before, adding volume in the right places is key to minimizing a heavy face. You can still have the long hair you desire -- just add some layers and volume, and maybe even a few highlights.