The way you react to doing something late is all the difference between whether you are going to success or fail after.

If you finally finished something that was a long time coming, and you are bummed about it, chances are you are going to be sad and unproductive. On the other hand, if you fishing and recognize that it was better done later, than never, and it is now done, then you use that energy to be productive and excited about everything that still needs to get finished.