Effort is its own reward if you allow it to be.
Isn't the drawing board the place where all the best work happens? It's not a bad thing to go back there. It's the entire point.
Make more decisions. That's the only way to get better at it.
Don't find customers for your products, find products for your customers.
Just about anything worth doing is worth doing better.
When you put your ideas in the world, then, and only then, do you know if they're real.