This is pretty amazingly well done. Here’s a boiled down version of its advice:
1. Don’t lead with the wrong view you’re trying to debunk, but rather, with the correct view you want to instill.
2. Don’t overload people with information. Be “lean, mean, and easy to read.”
3. Don’t attack worldviews—either find more persuadable audiences, or defuse deeply seated ideological resistance through practices like framing and self-affirmation, which reduce defensiveness. “Self affirmation and framing aren’t about manipulating people,” write Cook and Lewandowsky, “They give the facts a fighting chance.”
4. Don’t leave someone with nothing to believe—if you want to unseat a myth, you’d better provide a better real explanation in its place. “When you debunk a myth, you create a gap in the person’s mind,” reads the Handbook. “To be effective, your debunking must fill the gap.”