Usually when someone is venting at me, I feel like I should respond somehow and say something, but I have no idea what that something could/should be. Is it better to just listen or try to comfort them in some way?
In general, the best is to show that you listen and that you care. Sometimes trying to comfort them is good, but this depends so much on the person and situation that it’s hard to generalise.
Generally listening is best but there’s no universal answer to a question like this. People are complex. Some people want to be consoled, some people want feedback, some people want to be challenged, etc
But a general first line of defense is hear them out, comfort when appropriate, and don’t make it about you (“oh that’s crazy it’s like this one time I…”)
Personally, I find that people are most in need of someone to listen to them and validate their feelings. Don’t have to fix it. That was always a mistake I made in the past. I’m a fixer. If I see a problem, it’s my problem and I need to fix it. Just listen and be supportive.
Depending on your relationship with the person, it’s also sometimes okay to challenge distortions or exaggerations. My partner has started doing that for me and it’s been really helpful to reframe my problems.
That last part is what I struggle with as someone whose mind always tries to see things from opposing perspectives whether I want it to or not.
Sometimes my wife will come home pissed off about something one of her coworkers said. She’ll tell me the story and I have learned the hard way that “I think your coworker had a point, because X” is not what she wants to hear from me.
It is definitely situational; someone coming home frustrated and venting, probably not the time to offer suggestions or counterpoints; but a casual conversation when hanging out, then folks are willing to discuss if something was right or wrong.
I learned this the hard way from my wife over many years…
“Uh huh” “Yeah” “Wow” “Uh oh” “Daaamn…” and “Holy fuck!” are my general go-tos.
I don’t know if it’s the “right” thing to do, if there’s ever one right thing… But I usually offer something that validates their feelings, like “That really sucks,” or “They sound like a jerk.” Only if it’s someone I know well and I can read what they’re looking for, I might then comfort, offer advice, or talk about something to cheer them up.