Doxcare: Prevention and Aftercare for Those Targeted by Doxxing and Political Harassment
This CrimethInc. article is a valuble guide on personal security culture and what to do if your privacy is violated.
We Are Being Doxxed: What to do to Help Keep Each Other Safe
This zine from SPROUT DISTRO covers more information on doxxing and how to practice good internet / technology security culture.
A (paid) service that can be used preventatively or after a doxx. They will find and remove your information from date broker websites (MyLife, Spokeo, WhitePages, etc). *Note, you can also remove this information yourself, it will just take some time and proactive monitoring as these websites scrape for information fairly consistently.