My mental breaks include stopping in here for a chance to "visit" with friends, or thinking about my kids -- got plenty of their pictures to help me out there -- and if none of them work, then I try to visit with a co-worker for a moment to share woes, or simply try to change jobs so I'm still getting something done but it may not be as mind-numbing (or, alternatively, as mind-stressing) depending on how the day "isn't so great", especially if one job involves contact with people and another one does not.
Of course, if it's a certain person who's caused the day to take a turn for the worse, I can always use some of the visualizations given out here at DD... the under-water one, or my favorite Xeena Office Warrior.
CountriGal
Peer Moderator