Just enough
When you are working on something creative, be it a drawing or an essay, it is hard to draw a line in the sand and tell to yourself: "I am done here and this is it."
In fact, I think this could be the definition of whether something is creative or not — whether you can point out if there is a clear finish line to it.
This has a consequence that as creatives, we must employ authority over things we do. Unless this is a job and we have a boss over us, nobody will ever be able to tell us when to stop. We can ask for opinions of friends and families, even our employees, but the ultimate decision belongs to us.
And so, we must train ourself to see when it is enough. The trick here is that we have to point out the exact moment: not "barely enough" when we scrape the barrel to make the ends meet or "it has been enough for quite a while" and we don't know what to do with any more of it.
We need to see when it is "just enough."
I consider software engineering and entrepreneurship creative endeavors as well as painting, writing or music composing. The reason being simple: all of these require us to see when we have reached the point when it is enough and there is no point in putting in extra work. In fact, at this stage extra work usually makes the product worse.