My Current GTD Approach
Capture tool: Moleskine Cahier, pocket size. Precise V5 pen. Why? Fits in any pocket. Paper "starts up" instantly. Unobtrusive, quick input. Software: http://GQueues.com. Why? Integrates with Google Calendar. Good Web interface with drag and drop. Can be customized to work with GTD (they offer a video showing some ideas for that, but for inspiration I used the GTD Setup guide for Outlook from davidco.com ). iPhone app (not awesome, but it works). Cons: presentable but not beautiful interface; no search yet (but a good weekly review will minimize that problem!).