Ever since I read the book "Social Engineering: The Art of Human Hacking" by Christopher Hadnagy, I have been following http://www.social-engineer.org/ . This is a great free resource to learn about this element of cyber-crime. Most cyber-attacks have an element of social engineering. Humans many times are the weakest link in the chain.
Methods of social engineering include: influence, manipulation, elicitation, info gathering, psychology, science, profiling, communications modeling, facial expressions, body language, art, misdirection, pretexting, emotion hijacking, rapport..
They had a very interesting podcast interviewing Michael Bazzell, a former FBI computer crime investigator, technical advisor to the show “Mr. Robot”, and privacy expert. He runs a website called https://inteltechniques.com/ , IntelTechniques is your one-stop-shop for Open Source Intelligence (OSINT) training. There is a great “tools” section to help the common man do better internet searching. Another very cool thing they’ve developed is Buscador, a virtual machine pre-configured with tools for online investigators. The differentiator here is they have made point & click interface for non-technical folk to be able to use commands that would typically require a tech-savvy person and a command line terminal.