From Chuck Wendig at Terrible Minds, a list of 25 Ways To Be A Happy Writer.
25. Finish Your Shit
Every time you fail to finish your work, a little girl loses another kitten. A unicorn loses his horn and becomes a regular stupid old horse. A sweet old lady chokes on her dentures. But worst of all, every time you fail to finish your work it wears another small hole in your soul. You can feel it there — that ragged tear in your cloth, wind whistling through the gap. Because you know what it means. You’re giving up. Giving in. Handing over the keys. Letting the terrorists that are your Doubt and Fear and Uncertainty win. You know what all the books published and movies made and comics inked have in common? Someone finished what they started. And finishing will give you a bliss-boost. All your happiness circuits will fire like a 21-synapse-salute. Even if it’s not the best thing you’ve written. Even if it’s the worst.
Because the best thing you never finished is always less than the worst thing you did.
Emphasis added by me. Go read the whole list. It’s excellent.