This is an excellent quote from Marshall Vandruff:
One reason that people have artist’s block is that they do not respect the law of dormancy in nature. Trees don’t produce fruit all year long, constantly. They have a point where they go dormant. And when you are in a dormant period creatively, if you can arrange your life to do the technical tasks that don’t take creativity, you are essentially preparing for the spring when it will all blossom again.
It stands very well on its own, but I’ll take the opportunity to link you to one of Kate Beaton’s recent comics about the Canadian marathoner Tom Longboat, who early in the 20th century advanced the radical notion of not running flat-out every day, but instead interspersing “recovery days” into your training regimen. People called him lazy for it, but science, of course, proved him right.