Meditation can help you calm yourself in general, but when you are trading at your computer it is of little help. Because it is hard to trade efficiently and maintain a meditative state of mind.
What sort of psychological tricks do you use on yourself to combat your own FOMO?
I just think of a good tennis player. After the point is over, a good tennis player is immediately focused on the next point. They forget what was a point ago, and what may come two points in the future. They are focused on the present.
I try to be like that. Not to think about past mistakes or lost trading opportunities. Just focused on the next move. If I miss it fine. If I get it right fine. Keep going.