For many years, I have tried different systems to realize the GTD principles. Since 2006, I have used tracks.tra.in website. And I still use it today. Before, I have tried todo's (or tasks) in Outlook, reminders in a mindmap (freemind), checkboxes in a logbook, gtdtiddlywiki (that one didn't last at all). Most of time, I used a mixed approach and keep tasks in two to three system at the time. Which is not recommended... I know. My reality is: a new task comes up, no time to loose so I write it down in my logboook and transfer them back to an "online" system. This double re-entry process forces me to re-think my tasks, which is not a bad idea. However, the "online" version always take a bit to much of time: boot up the software (outlook, browser ...), login, click here and there (date selection is never fast), choose a tag, add information (that may or not help). Exchange+Outlook never worked great for me. Category (or tag, or label, or project, or contex...
