In case of sleeplessness, the first thing to do is to remove all the possible physical causes which can be reached directly or with the help of a physician. Thyroid irritation for instance may at times make one more sensitive to even faint noises and a thorough medical examination should be undergone. The dentature should be examined with the help of X-ray photography in order that pus pockets, impaction, and other defects, not observable with the naked eye, may be revealed and remedied. The diet should be regulated so as to exclude indigestible foods while assuring, especially at night, sufficient nourishment. All stimulants should be avoided. A walk before retiring is very beneficial in all cases, not because it "tires" the subject, but because it absorbs the chemical products thrown into the blood for emergencies which did not arise in the course of the day. A long walk or any arduous exercise, on the other hand, might do more harm than good if they brought about the phenomenon of the second wind. Any form of physical or mental exercise involving rivalry or competition is to be avoided at night. The excitement caused by the "fear of losing" would again fill the blood with "fight or flight" products. Heated discussions, the witnessing of exciting films or plays, drives with a daredevil chauffeur, etc., are not conducive to peaceful sleep. When all those means fail, many devices have been offered to insomnia sufferers, such as prayer or counting sheep, reading, listening to some monotonous stimulus like the buzzing of a faradic inductor, or of an electric fan. A distinction must be made between stereotyped prayer (such as the Lord's Prayer) and personal prayer rehearsing one's worries and asking for help. The latter kind is not unlikely to revive all the day's problems and to set the would-be-sleeper solving them over again at the very time when he should forget them. The repetition of some passage which was memorized in childhood and which, from long familiarity has become perfectly impersonal, may go a long way toward creating the monotony, and hence the feeling of safety, without which there cannot be any sleep. After following all the rules I have laid down a number of people will still be unable to sleep. When the physico-psychic causes have been removed without improving the condition of the subject, the psychico-physical factors should then receive attention. As I said before, normal people can sleep under almost any conditions because their vagotonic activities function regularly, while neurotics cannot sleep well even under ideal conditions because their sympathicotonic activities are constantly raising a signal danger and imagining emergencies amidst the safest surroundings, mental and physical. The insomnia sufferer is suffering from some fear. That fear has to be determined and uprooted by psychoanalysis.