There’s an interesting article in the Economist about how people procrastinate less when given concrete tasks, rather than ones which require abstract thinking. This could well be relevant to how we should phrase the tasks we write in Autofocus or Do It Tomorrow (or any other time management system).
http://www.economist.com/science/displaystory.cfm?story_id=12971028
As the team report in Psychological Science, in all three studies, those who were presented with concrete tasks and information responded more promptly than did those who were asked to think in an abstract way. Moreover, almost all the students who had been prompted to think in concrete terms completed their tasks by the deadline while up to 56% of students asked to think in abstract terms failed to respond at all.