Now What?

   I was just thinking you know how everyone seems to say it's best if you live right here in the "now" but nobody can ever make it clear to us what exactly they are talking about when they sum it up in that one word - now.
   Well I got to thinking just what is it that now does, like what effect it has on us in the long run, from our past to our future?
   Now is the moment when everything that has ever been is all in the past. All that remains is the future.