20 Habits To Ditch In Your 20's If You Want To Shine In Your 30's

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Sun exposure.  Typically, it takes many years for sun damage to appear, so the damage you did in your 20s will start showing up in the form of wrinkles much later.  Even very short sun exposures for fair-skinned, freckling populations can lead to early wrinkling.   Use a sun block and limit the amount of time you spend in direct sun.