Even when it's been shampooed that very morning, hair can often end up greasy and limp by the end of a long day. But if you need to freshen up for a night out on the town, you might not want to put your hair through another shampoo. For a quick pick-me-up, try spraying your 'do with Klorane Extra Gentle Dry Shampoo. The tonic feels and works very much like hairspray. You just spritz a little bit on the area you want to clean, leaving a sort of powdery layer on your hair. After letting the shampoo set for a couple of minutes, shake out the hair with your fingers or run through it with a good hairbrush. I used the product to spot-clean my bangs the other night before heading out to a bar: Not only did the greasy, lifeless look instantly disappear, but my hair looked clean and bouncy for hours. Buy a can for $15.95 here.