This may seem rather obvious, but I think it is worth repeating, particularly as the warm, humid air arrives to the Northern Hemisphere: drink lots of water and stay well-hydrated. Remember, water is called the universal solvent as it dissolves more substances than any other liquid. It is important for digestion, metabolism, and kidney functioning, to name a few. It is important to life. And it helps to keep us hydrated.
The experts recommend drinking one half to one ounce of water per pound of weight per day. So a 150 pound person should drink between 75 to 150 ounces of water per day, for instance. Personally, I notice that my nose is somewhat more moist after drinking lots of water whereas it feels somewhat drier after drinking soda or coffee. As an aside, two years ago, I installed a reverse osmosis system (Home Master) under my kitchen sink to purify our well water and reduce the total dissolved solids count, as purer water is more hydrating and healthier for you than hard water or water with a higher total dissolved solid count.
Although some health experts argue that water is the only drink we should ever have, other hydrating drinks I enjoy include hot tea with honey and coconut oil, as well as coconut water. Coconut water has become more popular in recent years and can be purchased at many grocery stores. Coconuts are packed with electrolytes and potassium which, because of these minerals, are quite hydrating and arguably slightly or somewhat more hydrating than plain water.