Starting a project is easy because, if you're anything like me, the first phase of writing is really fun. You're excited about the concept, and the words come easily.
But there comes a time in the writing process when the project loses its shine. You don't know what happens next. You're out of ideas. The well is dry, and the writing is hard.
Maybe this is the point where, instead of proceeding with the narrative, you start endlessly fiddling with what you've already written.
In the meantime, perhaps you've had a different idea, a new idea, which has all the glitter your first project had before things started getting difficult. It's quite easy to jump ship from the first project, which has turned dry and boring, to the second one, which has the electrifying aura of novelty.
But you know what happens next. The second project gets hard, too. You hit the exact same snag. And you face the same temptation to give up and move on to the next bright shiny idea. Soon you're trapped in a cycle:
Here's the thing: you don't learn how stories are written except by writing them. You haven't really written a story until you've finished it. And you can't finish a story unless you're willing to muscle through when the going gets tough and unpleasant.
You will learn so much more from finishing one story, however bad, than you will from a thousand false starts.