The two key steps to falling asleep: relaxing your body and shutting down a busy mind.
That means you need to detach yourself from the stressors of the day. Stress elevates all your body’s functions. And the very thought of what you have left undone from the day can trigger the release of stress hormones such as cortisol, elevating your heart rate, blood pressure, breathing, and body temperature. In fact, it's the release of cortisol in the early morning hours that signals the brain to “wake up” for the day. This is the last signal you want to be sending your brain in the evening hours before sleep.