“First of all, if it’s on your mind, your mind isn’t clear. Anything you consider unfinished in any way must be captured in a trusted system outside your mind, or what I call a collection bucket, that you know you’ll come regularly back and sort through.”

 

David Allen, Getting Things Done

Getting Things Done   
http://en.wikipedia.org/wiki/Getting_Things_Done
What is GTD ?   
http://www.davidco.com/what_is_gtd.php