Update (2019/07/08): Several more including Consider Civility, Make America Dinner Again, and Center for the Study of Liberty…
1. Don’t assume bad intent.
2. Ask questions.
3. Stay calm.
4. Make the argument.
From http://www.ted.com/talks/megan_phelps_roper_i_grew_up_in_the_westboro_baptist_church_here_s_why_i_left