Perfectionism is a disease, not a virtue. It is ultimately rooted in fear and brings creative efforts to a halt. It has nothing at all to do with the pursuit of excellence or a desire to create a quality product.
When I am working on the rough draft for a new book, I do my best to suspend judgment so that I can focus on the task in front of me: creating my narrative and telling my story. The mindset required during this phase of a project involves trusting myself and my instincts, feeling completely free to create and not allowing myself to be held back by fears, inhibitions and unrealistic expectations. During this phase I only share my ideas with members of my inner circle who I know will encourage and validate my efforts.
Once my rough draft is complete, I can begin to evaluate and enhance the quality of my work. I can allow my inner critic to comment on the final result and get other trusted individuals involved who can constructively criticize and help me develop an exceptional (but imperfect) final product.
The best way I've found to hone my message is through repeated editing. I immerse myself completely in my words and carefully evaluate each sentence, making sure there is no waste or untruth. I've even been known to read my entire manuscript backwards, sentence by sentence, in an effort to see it from a new perspective. But eventually I need to stop editing and release my book, even though there are probably still a few errors in it. I never have and never will create a flawless book, but with patience and diligent effort I can write books that I'm proud to call my own.