great post on Mario Sundar's blog that seems to have originated over on the blog of Caterina Fake (of Flickr fame.) It's a method for keeping focus and it seems reasonable. You, of course, should figure out what works for you. But thinking occasionally about the accomplishments of the focused work of Edison or Einstein might give you inspiration to keep going and make sure at least part of your day is focused on your magnum opus.
Thanks to the Practicalist for this image and making available a PDF you can print and frame!