I don't normally post forwards of any kind, but I really really liked this one. The author is unknown, but it's still really good:

Make Every Minute Count
- To realize the value of ONE YEAR, ask a student who has failed the final exam.
- To realize the value of ONE MONTH, ask a mother who has given birth to a premature baby.
- To realize the value of ONE WEEK, ask the soldier on leave.
- To realize the value of ONE DAY, ask a daily wage earner who has four kids to feed.
- To realize the value of ONE HOUR, ask the family who wait in Critical Care.
- To realize the value of ONE MINUTE, ask a person who has missed the flight.
- To realize the value of ONE SECOND, ask a person who has survived an accident.
- To realize the value of ONE MILLISECOND, ask the person who has won a silver medal in the Olympics.
So treasure every day, make every minute count for eternity.