Coping With Computer Related Eye Strain?

Dimus asks: "There were several very useful discussions on Slashdot about curing and preventing problems with wrists and fingers. But what about your eyes? How can you prevent eye deterioration? Do you have any tricks, exercises to fight eye pain, fatigue, and other problems? What monitors are better for eyes? Big ones? Smaller ones? TFT or CRT? What company do you think makes monitors that are better for your eyes?"