You can use mental rehearsal and programming to wake up at the desired time without an alarm Clock. No matter where you are, or in what time zone, you can “set your mind” on a certain time before you go to sleep, and you will wake up at exactly that minute.

Before you fall asleep, you say, “I wake up tomorrow morning at seven o’clock sharp.” You can then fall to sleep without worrying. The next morning, your heart rate will gradually speed up, waking you at your preset time. You will be unable to go back to sleep. You can even travel great distances and wake up in different time zones on schedule using this method.

Insomnia or sleeplessness has assumed alarming proportions in present times, especially
among the upper classes in urban areas. This is evident from the wide range of medication for
this condition prescribed by physicians and sold by chemists. Instances of persons taking an
overdose of sleeping pills with fatal results are quite frequent. Insomnia deprives a person of
mental rest and thereby interferes with his activities in the daytime. It constitutes a severe health
hazard when it becomes a habit.

Sleep is a periodic state of rest for the body which is absolutely essential for its efficient
functioning. Sleep gives relief from tension, rests the brain and body and a person wakes up in
the morning fresh and relaxed after sleep. The amount of sleep, however, varies within very
wide limits from individual to individual. Normally, seven to eight hours of sleep every night is
adequate for most people. Some, however, do well with four to five hours because their sleep is
deeper and more refreshing.

Insomnia is common among the elderly for a variety of reasons. The sleep of the elderly is often
punctuated by brief periods of wakefulness during the night. IN such cases it is the quality rather
than the quantity which is most affected. With age, there is gradual reduction of periods of deep
sleep. The older person, therefore, gets roused easier. Sleep requirements also diminish with
ageing. From nine hours of sleep per night at the age of 12 the average sleep needs decrease to
eight hours at the age of 20 , seven hours at 40, six and half hours at 60 and six hours at 80.

For correct living, it is essential to differential between sleep and rest. At rest the body is
disturbed by all exterior noises ; but in sleep it is screened from them by partial loss of
consciousness and also by what is called “dream protection.” One useful purpose of the dream
is to convert outside noises that might awake the sleeping person, into fantasies that do not
disturb him.
During rest the limbs are normal, but in sleep they swell. Blood flows from the brain, distends the
arteries, and makes the limbs bigger. IN sleep more muscles are relaxed than in rest, though the
sleeping person changes his position many times in one night (approx. 35 times), without knowing it.  Many
organs which work during rest suspend their activities in sleep. Thus the recouping value of
sleep is much more than that of rest or simple lying down.