I wish I could paint like some people play. I would trade what I know about creating images for the ability to play. I wish I could paint music.

You can, and you don't have to trade anything. You just can.

Dan:
Just say "happy" to yourself over and over while your drawing a pic, but you must only think the word happy nothing else.
You can do it with other words to.

You can yawn a whole bunch and say "sleepy sleep" over and over.

And don't think about what your drawing, just react to the color and the flow until you see a picture emerging.

It sounds stupid, but It will get you started in the right direction.

Your really good at drawing so this should be hard for you to do.