Dehydration

While this urban myth may be debunked, this doesn't mean there aren't a lot dehydrated people out there.

I've heard of two ways to determine if you are properly hydrated (without submitting to a modern health check): the color/clarity of your urine, and pinching the skin. The former I've found to correlate to my water intake and exercise (i.e., when I exercise, my urine darkens unless I drink a ton of water), but the latter doesn't seem to give any quality indication.

There must be a way someone can accurately and easily tell if they are getting enough water...