cheat sheets.

Zen Things Done (ZTD)
aka "Minimal ZTD: The Simplest System Possible"
For more info see 
http://zenhabits.net/2007/04/minimal-ztd-the-simplest-system-possible/

The Four Habits
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1. Collect
  * Write down any tasks, ideas, projects, or other information that pop into
  your head.
  * Get it out of your head and onto paper.

2. Process
 * Make quick decisions on things in your inbox, do not put them off.
 * Do it!, Trash it, Delegate it, File it (someday/maybe), calendar for later

3. Plan
  *  Each day, create a list of 1-3 Most Important Tasks (your Big Rocks for the
  day) and be sure to accomplish them.
  * Do your MITs early in the day to get them out of the way and enjoy the rest
  of the day.

4. Do
  * One task at a time, without distractions.
  * This is one of the most important habits in ZTD: Select a task (preferably
  one of your MITs) and focus on it to the exclusion of all else.