I put the paper that I wrote "calm down" on the pc's monitor.
By doing so, you can suppress relative emotions.
It is just but human nature to be worried and if we based our trades or bets with emotions, there is more chances that the outcome will be dependent of how you react to it emotionally. However, if you just follow with your pre-planned strategies, you relieve your self from the stress because you are eliminating the emotion part that way.