We can all agree that traveling is awesome. Getting there...not so much. But even the most excruciating red-eye can be made bearable if you stay properly hydrated. When you fly, try to consume about eight ounces more water than you normally would. (You'll thank us when you reach your destination feeling refreshed and not dried-out).

Those sculpted abs may have been built in the gym, but what you put in your body will determine how well you preserve them. And the No. 1 diet drink you need to gulp down? You guessed it: water. One study found that participants who drank two 8-ounce glasses of water before meals shed more pounds than subjects who didn't drink water before eating.

Did you slack on your SPF application? (Yes, you can still get a sunburn anytime of the year.) Then reach for H20. In addition to causing pain, sunburn can dehydrate you. Be sure to drink extra water if you're battling sun-scorched skin.

There's nothing like kicking back with a cocktail at the end of a long week. But nothing will take the happy out of happy hour like a mean hangover. Ward off headaches and nausea by guzzling a glass of water between each drink. Bonus: You'll also save lots of calories this way.

Unfortunately, if you don't swig enough water, you might not be in as good of spirits as if you'd properly hydrated. A 2012 study found that even mild dehydration had a negative effect on women's mood and energy level.