There's not so much a methodology for me to speak of. It's more being receptive to the formation of ideas, and ideas can come at any time. If there's any trick, it's getting those ideas down, letting them flow. Then I rest, and let the mind work more in the background. Often as not, it's letting the combination of previously documented ideas occur which builds the original into something more robust. I get excited when that happens. It gets the juices flowing, and builds an impetus to explore more. So it's an organic process.