Here's what I have in my mind when I want to sleep.
I am imagining myself as a pilot of a plane. I am turning to auto-pilot. I switch off the thousands panels I have on the plane board. My right hand starts from the right panel and my left hand starts form the left. There are 7 horizontal panels. The last ones shut down all the lamp in the cockpit. After that I got out of the cockpit and sat on a special chair for the pilots. A beautiful stewardess with long legs and a chain on the right ankle offers me a drink.
"Fast sleep or quality sleep?"
"Fast sleep, please."
"Here you are, Mr. Je."
"Thanks."
I take the drink and see the sky through the window. The clouds form a sentence spelled "HAVE A NICE DREAM". Then I sleep...like a baby :)