Yoga takes you into deep sleep

Modern city life and work of people great pressure, in this powerful pressure, insomnia for some people is like routine, and insomnia population age structure have been dropping. So how to overcome insomnia? I would like to create some sleep, good external conditions, such as selection of a comfortable pillow, adjust the brightness of the bedroom and so on, of course, not enough of these, plus some yoga practice methods will let you to the effect of deep sleep.