Analysis Paralysis!

Okay, I can be nerdy and analytical, too, wanting to test, optimize, test, refine, test... all to make the product even better before I finally release it to customers.  But it's easy for this process to continue with no end in sight.  At what point do you say enough?!  "But the customer would love to have this new bell/whistle that I just thought of."  "But I need to try this slightly different formulation...I think it will work better."  Enough already.  Save something for a follow-on product.  Get the product out-the-door, and get some feedback from your customers before you do any more analysis/optimization.  That feedback is so much more valuable than continued optimization in a vacuum.