You don't miss the water til the well runs dry

I was watching The Book of Eli a few hours back, and something struck a chord with me. Regarding the old days ( its set in the future so old days means now ),
Eli said,

"People threw away things we would fight for now. They didn't know what was really precious."

-well it went something like that-

I was just thinking. How true. People just don't know how to appreciate things when they have it. A few songs come to mind.

Counting Crows - They Paved Paradise
Craig David - You Don't Miss Your Water (Til The Well Runs Dry)

Just something to we should all think about.