When you "sleep" you are not rally sleeping. If you take 8 hours of sleep, actually you sleep for half an hour.
The rest of the time you either dream, or you go into scupit, which is a particular state of consciousness reached during sleep. Peaceful sleep that you call sleep, is "nap sleep."
Let us put it in a Western term. If you can take a half hour nap, you can survive the rest of the time in absolute glory. Nap. Nap means switch off and switch on sleep. The best time to nap is anytime, but the most wonderful time is when you have eaten food. During the daytime, at what is called lunchtime you can nap for 10 to 15 minutes, If you can switch off, and you cannot switch back on, either your digestive system is wrong or your lower back is wrong.
Are you having trouble controlling your temper? Do you want to be calm and cool and be self-contained? Drink 10-12-16 glasses of water a day! Keep a pitcher of water on your desk if you can. Maintaining water balance is very important. Be sure to drink a couple of glasses first thing in the morning to flush out the kidneys, and drink a Glass before bedtime so you won’t sleep dehydrated, which can cause bad dreams.
DRESS IN WHITE
When some day you are totally depressed and negative, which is normal and it happens sometimes, do the following experiment. Take a shower, rub yourself thoroughly with a soft towel, and then dress yourself from top to bottom in white. From that negative state to that positive state will take normally about 15 minutes. You will be a different person. It is that physical, a gross physical action which can change your temperament, consciousness and energy.
From the book Ancient Art of Self Healing which is a collection of excerpts from lectures, notes and classes by SSS Harbhajan Singh Khalsa (Yogi Bhajan)