Distraction has always been my first line of defense against triggers, followed by leaving the place of being triggered. I have photos of my wife, cat and favorite counselor on my phone to look at. I also have phone numbers to call, even to just leave a voicemail message. Music has been huge too, turn on anything Cocteau Twins and off I drift. I have not had to use any of these tools in several years, but I've used them in the past and I know where they are, just in case.