I spent all of yesterday trying to design a UI for an app that will help with Getting Things Done. In the end, I failed. I don't know whether this is because I don't understand the methodology enough, or because the methodology inherently lends itself to simple, already-available tools. It's certainly true that I don't understand GTD well enough, but I don't know if that's why I failed. I had some decent ideas for the UI but, frustratingly, all of them ended up feeling more complicated than the system I'm already using - an OmniOutliner 3 document.
I'm excited about MacWorld SF, because I'm excited about the rumoured iWork suite. I have a pretty high regard for Thinksecret's rumour-mongering. I well recall