I get a word of the day email, and today's word just about sums up my life's problems:
idee fixe \ee-day-FEEKS\, noun:
An idea that dominates the mind; a fixed idea; an obsession.
The reality of obsession -- its incessant return to the same few themes, scenarios and questions; its meticulous examination and re-examination of banal minutiae for hidden meanings that simply aren't there; the cancerous way an idee fixe usurps other, more interesting thoughts -- is that it is confining, not rebellious, and not fascinating but maddeningly dull.
-- Laura Miller, "The Streetwalkers of San Francisco", New York Times, August 20, 2000