I am interested in recommendations for tools and techniques to help with backlink prospecting. I have collated thousands of relevant urls into a spreadsheet, for each I would like to approach the owners and convince them to link to a site. Of course I can't reasonably expect to convince them all to link to me. While some may have a mechanism for me to post a link (directories etc.) visiting the links one by one, finding a contact page, and starting a dialogue will require many hours of leg work.
I am thinking at least some automation will be needed here.