Sheralyn Pratt at her blog has shared five Marketing Myths. This is different from the writing half-truths I've posted on. Hers are about the commerce part of art vs. commerce. Her myths are:
1. Think big.
2. Do what you love, the money will follow.
3. Aim for your goals.
4. Practice makes perfect.
5. Be yourself.
You'll have to go to her blog to see how she unpacks these.