I have been rereading Seth Godin's "The Dip". It deals with knowing when to walk away from a project or idea and when to keep on plugging along through "The Dip".
When we start new projects results start happening pretty fast. Anything outside of everyday business has an immediate direct impact on what we do right away it is when efforts exceedingly push us with lack of results is when we start to experience the dip.
At that point we have decisions to make. Keep exerting effort with the end result in our grasp or to abandon those efforts and continue to seek the low hanging fruit. It is how we respond during the dip that makes or breaks us in everything we do.
Being the best in the world is the ultimate goal in any endeavor and as soon as we lose sight of that the efforts diminish and momentum is lost. I don't know your goals I know mine. I will keep plugging along as I work through the dip, will you?
Follow Seth's blog on the dip and get a copy for yourself http://sethgodin.typepad.com/the_dip/