Seventy percent
Okay, yes, I admit, I'm a bit of an Oliver Burkeman fanboy. He's been an antidote to my tiresome fixation on professional development books and productivity systems. If he started a cult, I probably wouldn't join. But I'd have to think about it.
Today I'll fanboy about his 70% rule. The opening paragraph of the linked post reads:
The 70% rule: If you’re roughly 70% happy with a piece of writing you’ve produced, you should publish it. If you’re 70% satisfied with a product you’ve created, launch it. If you’re 70% sure a decision is the right one, implement it. And if you’re 70% confident you’ve got what it takes to do something that might make a positive difference to the increasingly alarming era we seem to inhabit? Go ahead and do that thing. (Please!)
(Go read the rest. It's good.)
I have some perfectionist tendencies, especially when it comes to writing (I know, you'd never know it from this blog), so I love this rule. Once something's good enough for the intended purpose, just do the dang thing and move on.