I just realized last week the value of the mindsweep with one piece of paper per idea. I use the back of the Dilbert one-a-day tear off calendar. It is way better than an entire sheet of paper with 8/10 things crossed off at the end of the day. When those were gone, I used recycled paper from my bin, and at the end of the week I had no recycled paper left!
The G in GTD is for green, right?