At age 24, I spent a lot of time thinking about writing and drawing, significantly less time actually writing and drawing. I had finished exactly one (1) short story, several years prior. This event expanded my ouvre by a significant percentage. It was a tiny revolution.
When you start a creative project but don’t finish, the experience drags you down. Worst of all is when you never decisively abandon a project, instead allowing it to fade into forgetfulness. The fades add up; they become a gloomy haze that whispers, you’re not the kind of person who DOES things.
When you start and finish, by contrast — and it can be a project of any scope: a 24-hour comic, a one-page short story, truly anything — it is powerful fuel that goes straight back into the tank. When a project is finished, it exits the realm of “this is gonna be great” and becomes instead something you (and perhaps others) can actually evaluate. Even if that evaluation is disastrous, it is also, I will insist, thrilling and productive. A project finished is the pump of a piston, preparing the engine for the next one.
Unfinished work drags and depresses; finished work redoubles and accelerates.