Sleep is a recovery period that the body needs for healthy living.

But sometimes, we all find times when you do not sleep easily accomplished.

There are several factors that can help us:

- The darkness and the eyes constantly transmit messages to the brain.

Sensory stimulation of the brain through these signals helps to keep us awake, so a dark room, it is important for the person who has a light sleeper.

- Noise: Hearing is a sense that is lost more slowly than the eye. There are even people who sleep in places