Here's a productivity tip...
A while ago I used a wiki to keep all my TODO's up to date. For some reason I stopped using the wiki but I've dusted it off and it's back in full use. The nice thing about using a wiki to keep everything in order is that you can keep multi-dimensional lists and hyperlink to pages that explain 'stuff' in detail.
I'm using "PmWiki":http://www.pmichaud.com/wiki/PmWiki/PmWiki but I recommend "DokuWiki":http://www.splitbrain.org/projects/dokuwiki for it's simplicity - both of these wiki engines are PHP based and allow for flat file based databases.