Just looking at the photograph above makes me search for my libation — a sign that I, like most people, don't get enough water every day. Thirst is just one of many signals our bodies can send us to ask for a drink; there are at least 12 other dehydration symptoms, according to Health.com. Among them: tiredness, headaches, dry skin, irritability, sugar cravings and even bad breath. So take hydration seriously and pour yourself a cool glass of water. It's one of the best things you do for your health.