Here's what I remember teaching my class:
1. Cool down.
2. Ask the person you had the conflict with to the "Talk It Out" rug.
3. Give the "I" message.
Tell the person how you felt when they did the action causing you grief. It should be an "I" message, not a "You" message.
Example of wrong thing to say: "You are rotten. You were nasty to do ...."
Example of the better thing to say: "I felt really sad when we were out on the playground and you took the ball away." Then listen to what the other person says. It may have been a misunderstanding.
4. Come up with a solution so it doesn't happen again.
5. Part as friends after agreeing to what will be done next time.
I looked on line and found something from Brigham Young's Center for Conflict Resolution. And here's another site from Teacher Vision that actually gives a free lesson plan for Talk It Out Together. Both sites explain conflict resolution for children and adults very well.