You make good work by (among other things) making lots of work that isn't very good, and gradually weeding out the parts that aren't good, the parts that aren't yours. It's called feedback, and it's the most direct route to learning about your own vision. It's also called doing your work. After all, someone has to do your work, and you're the closest person around.

Art & Fear: Observations on the Perils (and Rewards) of Artmaking (ed. Image Continuum Press, 2001) - ISBN: 9780961454722