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• The best laid plans of mice and men are usually about equal. -- Blair's Observatio
• The best laid plans of mice and men are usually about equal. -- Blai
• The best laid plans of mice and men often go awry
• The best-laid plans of mice and men ... are filed away somewhere.
• The best laid plans of mice and men so often go astray.
• The best laid plans of mice and men are held up in the legal department.
• The best laid schemes o' mice and men Gang aft a-gley
  And leave us naught but grief and pain For promised joy. -- Robert Burns, To a Mouse...
• The best laid plans often go a fowl. -- Wile E. Coyote
• My best-laid plans have gang agley!
  -- Sideshow Bob, poetic to the end, "The Return of Sideshow Bob...