Did you know that when you don't drink enough water, you can actually gain weight? That's because when you aren't well hydrated, your body will hold on to water.

The advice about how much water one should drink can get pretty murky. Some say 6 glasses a day, others say 8. Still others say only drink when you are thirsty, while some advice will tell you to drink as much as you can. Though it's less than pleasant to talk about, I tend to agree with the experts who say that your urine will tell you if you're well-hydrated: Clear and pale is good. Dark or cloudy means it's time to increase your level of fluids each day.

If getting in enough water is tough for you, don't forget that you can load up on fluids through the foods you eat as well. For instance, did you know that watermelon is roughly 90% water? Maybe that's why it tastes so good on a hot summer day! According to CNN, about 20 to 30% of the water we need come through our food. Check out their advice on eating your fluids to stay hydrated.