My experience of PTSD has improved quite a bit over the years. My frequency of being triggered has decreased immensely also.

Some things that work for me:

Talk therapy, plenty of time to talk things through with a good therapist, time to develop and understand the story of what happened to me, time to make choices and develop new skills

Experience, habit change, practice practice practice

A willingness to experiment and discard what doesn't work without beating myself up about it, while continuing what does work

Strong focus on what soothes and distracts me in a healthy way

Honoring my feelings without throwing more fuel on the painful ones

An example: for several years I lived in an apartment complex where police often had to respond, sometimes I had to make calls myself, I'd find myself hypervigilant and triggered each time I saw them. I'd pace, I wouldn't be able to stop watching whatever traumatic thing was going on, I was upset and often crying, it would affect me for quite awhile after.

I determined that all my feelings were okay and I also wanted to be easier on myself. I noticed that I tended to hold my breath when triggered so I practiced slowing and deepening my breathing, that helped.

I practiced telling myself helpful things like:

"I've done the best I could. I called the police, they are the proper authorities for this situation. My door is locked, windows closed, I am safe. They don't need my help with this and the best thing I can do to help myself and everyone else is to take good care of myself.

So......have I eaten recently? Feeling shaky from low blood sugar won't help me deal with the current situation. I can eat some crackers and have some milk. Okay.

I can watch a little of what is going on but only if I remember to keep breathing in a relaxed fashion. I notice my heart is pounding faster, I feel scared, and I feel on hyper alert.

Okay. I have a good book I am reading, I can relax back in my bedroom away from the triggers and distract myself. Later I can take a relaxing shower. Maybe watching light TV would be fun."

Taught myself how to deal with nightmares, I imagine going back into the nightmare and I change the circumstances to good outcomes for me

Exercise

When I can focusing on what I am grateful for and what I've done successfully - this can even be something as simple as managing to brush my teeth!

Staying away from people who live dramatic whipped up crisis filled lives

Remembering that this too shall pass, I've survived this before