IT enemy No. 6: You/Me/Us
We have met the enemy and he is us, to quote Pogo's Walt Kelly. When things go wrong with technology, IT people often have no one to blame but themselves.
Recognizing the enemy: Look in the mirror, my friend.
Your best defense: Return to boot camp. Discipline and training help IT pros avoid succumbing to their weaker natures. However, no matter how well trained you and your IT colleagues may be, you'll still have to deal with users who aren't.