From my purely anecdotal experience with mentoring younger people, I've seen two main categories of venting: 1) Venting about frustrations by talking them through with someone who will listen. This forces people to put their frustrations into words and elucidate the narrative as they put it into words. This can not only help people identify their feelings and work through them, but it also forces people to decide wha…
Yeah, I know it's anecdotal... but when I've had issues with people that "stuck", and didn't go away on their own, I've had a lot of success writing those people a letter. It forces me to present all the information factually, how I feel about it, why I feel that way, etc. which helps elucidate the charitable and less-charitable interpretations of what happened. In writing, I have to reread and edit what I wrote a do…
I sometimes do the same thing, and after I get my ideas out/vented, I end up rewriting the letter with gained empathy/understanding, and then use that as an outline for a conversation (if not reading the letter verbatim for especially difficult subjects) with the person. Otherwise, even if I feel a little better, nothing actually was resolved.