Related:

• One good turn gets most of the blankets. -- Murphy's laws on sex
• One good turn deserves another. -- Gaius Petroniu
• One good turn asketh another. -- John Heywood
• Sometimes one pays the most for the things one gets for nothing. EINSTEIN
• XXXVI: The thickness of the proposal required to win a multimillion dollar contract is about one millimeter per million dollars.
  If all the proposals conforming to this standard were piled on top of each other at the bottom of the Grand Canyon it would probably be a good idea....
• The one who does the least work always gets the most credit.
• In any department there will always be one person who understands computers.
  This person usually gets transferred to another department....
• One slip does not make a person forever a failure, anymore than one good turn makes a person forever a saint.