Dehydration

Back many years ago, when I was but a lower-case t, the usual advice regarding water consumption was to drink enough water so that your piss is clear. As we get further into the summer, this is still good advice. Drink lots of water and stay hydrated.

On the same note, drinking beer, champagne, and Jack Daniels until the resulting effluvia is clear is not going to help you in the morning with respect to dehydration.