• Emacs PlannerMode
• Don't Break the Chain e.g. http://dontbreakthechain.com/
• didn't feel the need to keep streaks alive
• GTD
• weekly reviews, which I thought would be useful, never caught on as a habit
• RescueTime
• tracked applications running on the computer, gave a score based on what you thought were productive/unproductive (specifically applications and websites, if not necessarily tasks)
  
• may come back to it, though I was very much discouraged by the removal of tagging

Unsure about

• More than one monitor
• do I just open more windows and run out of short term memory (in my brain, that is) about what I was doing?
• "Read later" systems
• do I just shift from starred items or tabs to the 'read later' pile (currently Instapaper)

Why Didn't They Work?

• systems not customizable enough
• don't help me do what I want
• I don't know what I want to do to begin with
• I don't really want to do anything
• of course that's not true. There's lots I want to do. There's just much that I do that I resist.
• often means more work for others
• doing stuff can be tiring
• if I have to remember to do it, I must have some resistance against doing it