Like software architecture, there is some structure around this - this is like debugging.
Drip emails set up like a course.
Google analytics - tracks usage, search terms, facet usage
- HN Comments (lot of individual feedback on missing talks)
- Reddit posts in /r/startups (being found by writers)
- dev.to (90k twitter list)
- Something that probably will work is Cooper Press (weekly dev emails - they do a lot from reddit posts)