In engineering there's a maxim, "Perfect is the enemy of good enough!", yet the wisdom of this goes far beyond engineering.

In entrepreneurship, you're far more likely to achieve your goals by "failing fast and smart," rather than trying to get everything perfect. If nothing else, what's perfect in your mind is unlikely to be what the market feels is perfect.

So you can spend a year to perfect something, only to learn that the market doesn't like it, or you can spend two months to get to a "good enough first cut," and learn from the market what really needs to be fixed.