Psalm 90:12
So teach us to number our days, that we may gain a heart of wisdom.
 
Compared to eternity, life is actually very very short.  When was the last time that you stopped and counted the approximate number of days that the average person lives?  When we understand that we are on the doorstep of eternity, then it really does change how we view heaven and hell, how we view the good news of Jesus Christ, and how we view life.
 
My personal prayer today is that I will see the limited amount of time that I have here on earth that I may use each moment for the glory of God.