For me, triggers can be very difficult to notice, handle, and/or control.
It's a long step by step process that I have to desire (to want) more than I choose to keep reliving the same problems.
Step one is figuring out I have a trigger. This usually happens when I am triggered, and in the state of being triggered will take a mental moment (?) outside myself to notice that I have been.
Step two is where I figure out what the trigger IS.
Here, I'll avoid the trigger while I dig deeper and find out where it's coming from.
I can't heal the problem if I'm just attacking the symptoms when it comes to medical treatment; I act the same way, in myself, with MY mind. (Whom I'm the only one that has any real control of anyways, right?)
Once I find out where it's coming from (Sense of self, PTSD, BPD.... etc) That's when I really begin to start healing the problem, instead of attacking the symptoms.

The Healing Process:
Talking with people who understand where you're coming from. Communicating with others who will validate your opinion, rather than knock it down. (Unless you really are off the chain!) Letting those you spend a LOT of time with KNOW your triggers, and realizing if they won't help you, they're not worth your time. Accepting that you have triggers, recognizing them, and knowing they are not the sum total of your worth as a person. We are all human.