Learning who your gaslighters are first then learning to apply methods to combat those people. You know what you are talking about, and if not, don't be a shithead and act like you do. Don't be the gaslighter. Unless you want then fuck you. Know the weapons of mental warfare. "It’s important to remember that not all disagreements or differences in perception are evidence of “gaslighting”. Memory is a funny thing. It’s not like a movie. Often our memories are influenced by current issues or assumptions, by faulty information, or by miscommunication. That’s why eye-witness accounts of the same event by different people are sometimes so contradictory. All relationships sometimes have moments where one person’s memory of an event is at odds with the other’s. That’s not gaslighting." https://psychcentral.com/blog/7-ways-to-extinguish-gaslighting#1