If you were sliding down the side of a mountain to your certain death, would you insist on grabbing hold only when the very best opportunity presented itself?
Hell no! As long as you could make a good grab, one that would at least slow you down and give you better opportunities for better grabs, you’d do it.
I have clients who argue with me about this. If you’re creating a product – a book, a DVD, a membership site – for the first, second or even 3rd time, you don’t need “perfect” or even “great.” You should be happy with “good enough.”