I think that it is more worthwhile to stick with a story and revise it and try to finish it than abandon ship. Revisions, for any writer, are the name of the game.
Gail Carson  Levine

It is more worthwhile

Your hero should never solve all his problems at any point in your story before the end. He can solve one problem, but another one must still be looming.
Gail Carson Levine

Your hero should