So I've been dealing with a rather... stupid situation lately. I'm dealing with a person who is immature, self-obsessed, and has on more than one occasion shown sociopathic tendencies. They are attempting to bully me, and get under my skin, and I am trying very hard not to react. I've tried counting backwards from 10 and keeping my breathing slow and deep, but sometimes that just is not enough.

So, how do you stay calm?