It is rare for an excellent end product to bear an accurate resemblance to the idea that started it. It only mainly maintains the essence or initial concept. An idea conceived has to go through many adjustments, changes and refinement before it results in an excellent end product without defects, a product which bears the hallmarks of all the nuances and intricacies that make it stand apart from others.
Therefore, do not procastinate the start of a thing or else you miss out on the complete refinement process and in your hurry to deliver will put out a mediocre product. Also, do not be overly anxious and quick to put out your product. Put it aside briefly, once in a while, take another look at it, you will end up taking it on a more inspired and fresh route to completion. This is the more excellent way.