Tiny projects keep it new

"When you break a big project into smaller chunks — into tiny projects — you stand a better chance at maintaining motivation and rekindling interest. When you have a pile of tiny projects you get the chance to work on something new more often. We do our best work when we’re excited about starting something new.

The best way to optimize for new is to break features and projects down to their atomic level. Keep breaking them down until you all you have left are a lot of small project elements instead of a few big project molecules."

http://www.37signals.com/svn/posts/908-tiny-projects-keep-it-new