We did a whole bunch of research, and everything we recommend is vetted--daily--by independent advisors who study disinformation and how to combat it. Here are a few studies and other resources we found helpful in developing our tactics--find more about best practices in fighting the lies in our Welcome Guide:
Peer-to-peer persuasion works better than bots or bad actors
Start and end messages with the truth: from George Lakoff and the Debunking Handbook 2020
The psychology of disinformation -- 3 part series
Not clicking, commenting or sharing can stop the lies from rising to the top of social media feeds: from Sprout Social and Business Insider.
This MIT study describes how most disinformation is shared inadvertently online, how thinking critically disrupts the sharing of disinformation exponentially, and how many people will think more critically and refrain from sharing misinformation for the long haul with just one correction
Find common ground to open minds: Race/Class Narrative recommendations
All of this suggests that real people sharing, with trusted contacts, strategically-written truthful content that exposes bad actors is the most effective tactic individuals can employ to make folks stop and think, and thereby disrupt the flow of the lies.