Can you elaborate on this? I'm really interested in the type of work that you did and your negotiating process. Was it software development? What type of companies did you work with?
Yes, it is software development. It actually started when I was working at IBM. I asked if I could go part-time, and they said yes, offering 57K for 30 hours a week.
I was also talking to some startups, and told them about the offer I had, asking them to beat it by offering 60K for less hours. One of them agreed, and I worked for them for 2 years.
I followed that model for a few more years, working mostly with service-based companies who were willing to bill me out for part-time work.