On-the-go gals know how to multitask like pros by washing their face in the shower. Not only does it save time, but it opens up pores to receive all the moisturizing, cleansing goodness of face washing products. What they might not know is that they can undo the complexion-saving work of said products washing their face before they've shampooed and conditioned their hair. Otherwise, the runoff from hair products can clog the very pores they've just cleansed.

Unless you're a fan of ingrown hairs, make sure you prep your skin for shaving by exfoliating in the shower. That way, your razor is more likely to grab any hairs that would otherwise be trapped under dead skin. And speaking of razors, don't store 'em in the shower where they're likely to get rusty and irritate delicate skin as a result.