This article from Kristen Hallows http://jobyoudeserve.blogspot.com/2007/01/rome-wasnt-built-in-day.html, is great.

I love the image of watering the seeds everyday and keep doing it even when you don’t see anything coming out of the ground. The roots are created and one day you’ll see the results of your commitment. That’s something that we coaches really need to keep in mind.