Breathing exercises help me as well.

I breathe in really deeply, inhaling for as long as I can, making my chest rise as far as it can go. While doing this I count in my head. I imagine that my body is being filled with good things like healing and peace. Then breathe out until I count to that same number. I imagine that all the pain, suffering and illness is leaving my body. Every few times I try to make the breaths longer and longer.