2. Stay hydrated—with salt water

When it comes to H20, salt is not the enemy. "Water needs electrolytes like sodium, potassium, and chloride to be best absorbed," says Jenny Westerkamp, an R.D. in Chicago, which explains why they're added to popular sports drinks. She recommends adding a pinch of Celtic sea salt or real salt (unrefined and unbleached) to your water before chugging. "The electrolytes in the salt will push water into the cells where they need to be, rather than letting the water get flushed out, causing you to go to the bathroom every other minute." You'll notice a spike in energy after staying hydrated, too, and you'll be less likely to give in to cravings which are even harder to avoid when you're running on empty.