10. The 8-glasses-a-day rule

One of the most persistent medical myths is the notion that you should drink 8 glasses of water every day. The fact is, we actually get most of the water we need through food. Water is found in prepared foods, fruits, vegetables, juice, tea, and other beverages. Although drinking water is certainly a great way to stay hydrated, water is by no means your only way to stay hydrated. If you worry that you seldom drink water or other beverages because you rarely feel thirsty, it’s likely because you’re already getting enough water from the foods you eat. Our body tends to do a good job of signaling to us that we’re thirsty and need a drink long before we actually get dehydrated. As long as you drink when you’re thirsty, there’s no need to obsess about getting 8 glasses of water a day. Just listening to your body should be good enough.