Peace is more than the absence of war. Think about what peace means to you. This will guide your pursuit of it.
Peacemongering or peacemaking is the cultivation of a nonviolent and pleasant world. Learn peacemaking skills. Know how to teach peacemaking skills. Here are some peacemongering links.
Understand war, violence, and conflict. Once you understand them, you will begin to see how to take them apart. Think about what causes war and how to stop it. Consider the causes and reasons of violence and how to prevent it in communities and in individuals. Examine the roots of conflict and how to analyze it.
Horrible events can cause traumatic stress. Learn how to give emotional first aid to yourself and other people in an emergency. Know how to help adults and children cope in the aftermath. Trauma-informed care acknowledges the impact of this stress by asking "What happened to you?" instead of "What is wrong with you?" Most guidelines in this area focus on health care, but TIC applies to all contexts because traumatized people are everywhere. The principles generalize readily to wider uses. Hurt people hurt people, so it is vital to protect yourself and help them heal in order to have a peaceful world.
Resilience helps people withstand challenges without taking irreparable damage. Know how to improve your resilience and teach it to others.
Conflict resolution is an important life skill. Use it at home and at work. Develop your conflict resolution skills. Be prepared to de-escalate tension. Then you can mediate conflicts when they come up and teach children or adults how to resolve conflicts. Here are some lesson plans.
Spreading peace requires that you become a peaceful person yourself. Do things that make you happy. Learn how to meditate; there are various methods. Know how to stay calm under stress and help someone else calm down. Consider a peaceful exercise practice such as yoga, tai chi, or aikido. Surround yourself with beauty and with nature.
In order to make the world a better place, you must first understand what makes a good place. Here are some principles for changing the world.
I've been an activist for decades. I've done marches, pickets, letter writing, donations, all the usual stuff. You know what has the highest rate of effectiveness in terms of people telling me they went out and did something? Writing about superheroes and the decent world they live in. Fine, I'll do what works. So here are my instructions on how to build community and how to make your hometown more like Bluehill. (Scroll up to see the poem that sparked that discussion thread.) This is a description of quiet rooms in case you want to make your own.