The body ranges from 50-75% water, depending on body size and age. The type of water you drink is also important. These days tap water is not recommended without being filtered, due to chemicals and other pollutants. There are a variety of filtration systems to choose from, including reverse osmosis, carbon filters, distillation, and more. You'll have to do some homework to decide which would work best for your needs. The better your water "tastes", the more you will be inclined to drink and the cleaner your water is, the Healthier for your body.
Caffeine and sugar are two substances that are notorious for dehydrating the body. If you plan to indulge, you will need to compensate by drinking more water. These two delicious culprits can also contribute to the depletion of your body's calcium and magnesium reserves, so you may need to increase your supplementation to mitigate these effects.
Fruits and vegetables are a great source for hydration, as are things like aloe vera and chia seeds. Did you know you can buy large leaves of aloe from many grocery stores? Slice, peel, and eat the interior like any other fruit. Seems a bit strange at first, perhaps, but the Health benefits are worth it. It's also very good for your skin and digestion.
Chia Seeds are tiny but powerful and the benefits are off the chart. Here are two excellent sites to learn more about ch-ch-ch-chia! Food Revolution Network & Harvard - T.H. Chan
Here is a great article on dehydration from Healthline.
Stay Moist, my Friends!