Original Link: http://www.lifehack.org/articles/productivity/productivity-made-simple-the-key-to-gtd-your-daily-graph-of-activity.html

Decision making… Sounds serious, doesn’t it? Thankfully, the whole idea turns out to be quite easy to grasp. But first… At this point you already know what the main elements of productivity are and where to start with GTD. This is all great, but we’re still lacking one important piece of information