It's great to figure out your triggers, so you can bring that awareness with you next time they come up! I also have a lot of stuff in my past that indirectly affect my emotions in the present. Using alcohol was always the most efficient way to annihilate those unwanted feelings, but clearly it wasn't the best way or those things wouldn't still occasionally haunt me. Getting sober means finding other ways to cope with those feelings.
The garden variety triggers are the ones that I tend to struggle with more actually. Sometimes they just come up unexpectedly and there's nothing I can do about it because I didn't see them coming!