I use the scheduling application Tungle.me which syncs with my existing calendars for easy scheduling and efficiency.  The folks at Tungle.me are trying to understand the needs of the calendar of the future.  As part of this they took a look at illustrating what the value of time is:

The Calendar of the Future got us thinking about the value of time. Every day, hour and minute is more than a spot to fill on your calendar. It’s more than a meeting, reminder or tick of the clock. It’s our lives.

Time is not a renewable resource, and it waits for no one.

The team at Tungle.me thinks sometimes a little perspective is all we need.

I think Tungle.me has a great point:

Time waits for no-one so what are you waiting for?
Stop wasting time on things you can’t control and focus on things you can.