UPDATE: This entry is a re-post from my currently retired other blog darnteuton.com. In January 2006, I was actually using Thunderbird instead of Apple Mail, but times have changed. By now my Getting Things Done setup is firmly in the capable hands of the wonderful application Things, which interacts quite smoothly with Apple Mail on Mac OS X Leopard. Nonetheless, for those still seeking GTD-bliss with Thunderbird, see below for my old implementation (I can’t guarantee it works with newer versions of Thunderbird, but feel free to try and let me know in the comments).