I like the simplicity of your system as you describe it. And it sounds like it works for you. Could your problem be due to lack of clarity of your goals or some kind of conflict at a higher level? If so, maybe it would help to make a list of goals, your life purposes, etc to expose any inconsistencies.
Originally Posted by vkk
Your brain is the ideal tool to deal with the dynamic prioritisation you mention. In my opinion, the simplicity of your GTD list ensures that your brain has enough info to prioritise effectively, without getting "bogged down" with the system.