Try to clear your mind as best as you can.. I know, impossible, right?!But just go slowly and really concentrate and try... Start with the top of your head and focus on relaxing just that part. Next, move to your forehead. Then your eyes, then your nose, then your ears, then your mouth, then your neck...continue all the way down your body and take your time. I usually am able to conk out when I reach my belly. I say a mantra in my head such as "relax" or "in-out" while concentrating on breath, in order to focus the mind. Light yoga before bed can really help you to relax and sleep too.