There’s another thing that really helps me a lot to wind down (I watch things like CSI before bed sometimes, so I know what you’re saying), and that is to remember this quote by a truly great being:

“Emotions are like soap bubbles. Don’t focus on the bubbles for they have no substance. Instead, focus on their source, which will promote tremendous bliss instead. In this way you stop identifying with your thoughts and emotions and can begin to identify with your real Self.” If that doesn’t give you the ability to rest easy, I don’t know what else will.

Hope that helps a little more.