When I helped my girlfriend write her resume, I sat down with her and just asked her about her work history. I was able to get her to talk about her accomplishments and could see what aspects of her jobs she was genuinely interested in, and those became a lot of the bullet points. They were things where if she sat down and tried to think of them herself, she would enter into Humility Mode and would be staring at a blank sheet. I wanted something where if an interviewer asked her about a bullet point, it would lead to a good story. Eventually we found a couple common threads (customer service expertise and library systems expertise) and tailored two resumes to fit each thread, depending on who she was applying to.
If you can sit down with a friend who is a good interviewer, that could help you recount some good details.