Not only is over-styling your hair potentially damaging, it's also becoming a dated faux pas. "The tight curls or waves are just so not the thing anymore, and over styling can age you. It's all about the effortless style nowadays. Think sleek, sexy, but undone," advises Mondo. "The key is to just do less. Take a second to look at yourself in the mirror after styling and make sure it looks as if you just woke up with perfect hair. If you did too much curl or wave, than bust out the blow dryer and pull the wave down hard and blow dry to release some of the curl in order to give you that lived in look."

Healthy hair is also in, so invest in a deep conditioner or bond-restoring product. We're obsessed with IGK Antisocial Overnight Bond Building Dry Hair Mask, $34, which you can spray on at night so you wake up with glorious hair.

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