The most effective way to do it, is to do it.
If you've got a talent, protect it.
If you're going through hell, keep going.
You never know what motivates you.
I can, therefore I am.
The dog that trots about finds a bone.
Wherever you are - be all there.
Expect problems and eat them for breakfast.
If you can dream it, you can do it.
Well done is better than well said.
There's obviously nothing wrong with selling your art - only an idiot with a trust fund would tell you otherwise. But it's confusing to know how far you should take it.