I try to focus on something to pull myself away from the flood of emotional reaction I am having.

My T told me to say to myself I am not a powerless child now, I am a grown woman who has accomplished many things in life.

It really would depend upon the 'trigger' but if it is something someone has said or done then I would remind myself that is usually to do with 'them' and 'their stuff' not to do with me.

Well done on realising that about your own reactions, that is a big part of the positive progress!