Drink more water by putting something (like ubber bands) on your water bottle, and you can magically see how much water you’ve drunk during the day. It’s awesome, and it’s simple.
If your mouth is dry and you feel thirsty, it’s already too late–you’re on the way to dehydration. Even if you think you’re drinking enough, you’re probably not (we all overestimate how much we drink). So drink up, geeks!