Furthermore, we experience two primary stages of sleep: rapid eye movement (REM) sleep, and non-rapid eye movement (NREM) sleep. NREM sleep includes many internal stages. The more we sleep, the less the body needs deep NREM sleep, and the more time we spend in REM sleep. Phase entrance is most likely to occur during REM sleep. The best way to implement indirect techniques is by the deferred method. The aim of the method is to interrupt a sleep cycle during its final stage and then disrupt it again after falling back to sleep, which makes sleep light during the rest of the sleep cycle. Sleep accompanied by frequent interruptions can be put to productive uses. Interesting Fact! When the deferred method was first made mandatory at a 3-day Phase School seminar in June 2008, the overall success rate immediately doubled. For example, if a practitioner (let’s call him Jack) goes to sleep at midnight, then Jack should set an alarm for 6 o’clock in the morning. Upon awakening, Jack should engage in some sort of physical activity, like going to the bathroom, getting a drink of water, or reading a few pages of this book. Afterward, Jack should go back to bed thinking about how, within the next two to four hours, he will wake up multiple times and make an attempt to enter the phase during each awakening. If Jack goes to bed earlier, then his alarm clock should be set back by that amount of time, since six hours of initial sleep is the optimal length of time. If Jack sleeps less than six hours, then the second half of his night’s sleep will be too deep. If Jack sleeps longer than six hours, then there will be little time remaining for attempts, or Jack may not even be able to fall asleep. If a practitioner naturally wakes up in a forceful manner, it will be difficult to regain sleep. Thus, it will not be necessary for the practitioner to get out of bed with the aid of an alarm. The practitioner should attempt to go right back to sleep.