Winter has some tips for what to "think" of instead--and remember, you're holding this for 10 seconds straight:

And that's it. When you have a fully relaxed body and a mind that's still for 10-plus seconds, you will fall asleep, period.

Remember that the pilots practiced the method over and over, and 96 percent of them achieved success after six weeks of practice. These weeks of practice are a worthwhile investment, because once you have it down, you can nap and sleep anywhere, which will dramatically improve your quality of life.