I call on my inner ones to help me out.
I recognize that I am triggered and in need of support.
I give it to myself.
What do I/we need? Where is the hurt? How can I /we help it?

An hour or so ago I got really triggered by something innocuous that I saw, that triggered up fragments of a trauma.
I noticed it. I tried to observe me, to see what I needed.
My breathing was shallow and my heart was pounding. I felt flooded with adrenaline or something.
So my need was to calm my nervous system.
I did some deep breathing.
I did some butterfly tapping.
I used my safe place cue word and let myself feel like I was in that safe place.
I did a body scan. I was calmer and not feeling triggered.
I got on with my jobs, but carefully, gently.

I need to add though that it has taken me a lot of therapy (in the past, and a little bit now) to get to this point of being able to calm myself effectively. When we first entered therapy, and for the first many years of it, we could not do this very well.
And, even now it doesn't always work.