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Fix a flat (style)

Even if you leave the house with volume, your hair can deflate later in the day. The quickest fix: dry shampoo.

Pick a travel-size version that fits in your purse. "These absorb oil—volume's arch nemesis—and some have proteins that cling to hair, making it look thicker," Schlenger explains.

Just lift several sections of hair on your crown and mist a spray-on dry shampoo right at the roots. Use your fingers to gently rake through your strands, flip your head upside down a few times, and—voilà—you have a re-volumized look!

Next: Choose the right cut