Race day is your reward.  Don't forget that.

"You have dedicated a lot of time to maximizing your experience in the marathon," says sports psychologist Dave Czesniuk.  "Remind yourself that whatever happens on this day, what a great day it is. Be prepared to have fun and enjoy random little moments over the course of the race. Enjoy the weather, whatever it may be, and the pure joy of simply inhaling and exhaling. This marathon is a celebration of your life. So celebrate!"

PERSONAL EXPERIENCE:  It's too bad the finish line is just that-- a line.  Because crossing it is one of the most rewarding, celebratory experiences of my life.  You'll find plenty to enjoy along the course... but when the going gets tough, try to remember the best is yet to come.