I feel as if I have a new super power, ever since finishing a draft of a novel. I can finish anything! Short story? Cake. Novella? Pie. Another novel? Doable. All it takes.. is starting.
It’s like I blinked and the sky moved ever so slightly, and now I can do things I couldn’t before.
Required for writers of all kinds: write a novel. Even if nothing ever comes of it, the powers of determination it will imbue you with are worth it.