One of the things I am currently struggling with using GTD is that I don't follow up on things very well. I have a list of next actions that don't have hard deadlines, but I've noticed they tend to slip through the cracks unless I place a due date on them (part of that may be that Remember The Milk shows those tasks first and alerts me on the day of the deadline).

While setting soft deadlines like that has been working pretty well, I don't want to fall into the trap of not trusting my system because I have items with deadlines I don't really have to meet. Is there a better way?