Focus on facts and your ability to change or not change the reality that you are facing. Feelings typically do not have much to do with facts. It is only when we internalize or personalize the facts that emotions tend to arise.

Watch the world as you would a movie. By removing our emotions, we can limit the amount of human emotion erupts when we see something that bothers us or uplifts us. Knowing that it has nothing to do with us, we can remain emotionless.

Control your responses to people and situations that tend to stir your emotions. Change your mind and think about something else. The feelings will pass until you become proficient in detaching completely from any human emotion. Then the emotionless response can become automatic.

Practice retreating inside of yourself. By disassociating from other human experiences and putting yourself into a kind of trance or meditative state, you can put down feelings and remain from their intrusion on your mental state.

Prepare to lose the good emotions along with the bad feelings you may initially been trying to avoid. Being emotionless also will rob you of the intense pleasure you can receive when the situation calls for good feelings

-Kanda-

(ripped from eHow.com)