What to do in the event of a cyber attack

I read an article authored by two IT people where the article provided what I felt was a bunch of misinformation about what to do in the event of a cyberattack.

I'm not disclosing here who the authors were or providing a link. Instead I thought the best approach was to provide direct actionable intel on what to do in the event of a cyberattack that counteracts the misinformation in the article.