Sagely advice from Wil Shipley on his blog post Success, and Farming vs. Mining. Although primarily about software (not least the difference between those who create to sell out and those who simply want to produce great software), the conclusion is something people in all creative disciplines should be mindful of:

All ideas suck, because they are just ideas. They’re worth nothing.

My success is because I worked to make the idea real. A lot. All my life. Starting when I was 12, I learned to program, and I’ve programmed every spare moment since. I didn’t become a millionaire until I’d worked at it for eighteen years. There was no genius idea I had. I just kept working, hating what I did before, and working some more to make it better.

And when you’re done with Shipley’s piece, read Austin Kleon’s How to Steal Like an Artist (and 9 Other Things Nobody Told Me), an excellent essay that advocates just getting on and creating stuff, rather than mulling things over and doing nothing