The Positive Classroom: challenging behavior-despite some of the happy-joy-joy ideas, it's still worth a read. I like the examples of how to address behaviors positively and calmly, and gives a closer view of some of the psychology behind it.
"A Mind Jar is a meditation tool to use whenever a child feels stressed, overwhelmed or upset. Imagine the glitter as your thoughts. When you shake the jar, imagine your head full of whirling thoughts, then watch them slowly settle while you calm down".