Accuentuate the Positive/Natural
My answer to your question is, as usual, more emotional, than logical. There are triggers that spur me me to be a good GtD practitioner and some other methods don't work as well. I keep all of my history and reference in electronic form and carry a Palm, but it's usually a good day for me if I don't refer to the Palm at all while I am working. During the day, I use a notepad, with which I create iterative, tentative schedules and keep notes of all my activities. My notepad represents who I am for that day, but once the day is done, I Process everything that is relevant into my Palm. There are two things that make this work for me: 1. My notepad is my life for that day - I am emotionally attached to it, and 2. When the day is done, it's history, and I want to record what's important and then throw away these pages, so that I can start with a brand new notepad tomorrow. This works for me better than everything else - some of my paper mail and email might sit for a few days without being Processed, but my notepad gets Processed every night, and then I review everything that I have in order to get ready to start tomorrow with a plan.