Sunday, I encouraged our church to focus on fasting. My central proposition was that one of the ways we should respond to horrific evil in the world is to fervently pray for global missions.
One of the greatest resources ever produced for the sake of praying for missions is Operation World: The Definitive Prayer Guide to Every Nation (Operation World Set). This book offers an overview of every country of the world and offers suggestions about how to pray for them. This resource would be on the short list of books I think every Christian family should own.
In the below video, Jason Mandryk interviews Patrick Johnstone about the origin and development of Operation World.