How do you calm down when you're nervous?

You can write down what the problem is and then some positive ways to handle it.
One way is to take deep breaths.


Find a comfort place weather it's in the living room with the TV on or video games, you need to find something to do to get your mind off what ever is making you nervous.
Also you can break down what you are nervous about by thinking why it is your nervous and address it by getting rid of that factor so your no longer stressed.  

Another answer.

Try some herbal tea or herbal calming tablets so you can get a grip and focus before trying to solve your problem .

do something that will give the pain away. Like go to dinner or something.