There is no dress rehearsal. 
Every moment counts.  If you do
not get the moment exactly as you wish, why then, you take a step forward, hold
your head high, and enjoy this moment that now presents itself.  What does it have to offer?  What do you have to offer others?  Life is about the doing and the being, not
about the practice.  It is not practice
or rehearsal for something greater to come. 
Something greater will always come when you see each now-moment as the
performance of your Life and fill it with Love and best intentions.