Having sleep problems like insomnia is completely irritating. Insomnia means difficulty in falling or staying asleep, the absence of restful sleep, or poor quality of sleep. The most common causes of insomnia are medications, psychological conditions such as depression and anxiety, environmental changes like travel or altitude changes, and stressful events. Insomnia can also be caused by faulty sleeping habits such as excessive daytime naps or caffeine consumption. Appropriate sleep habits are important in the management of insomnia. In some instances, changing sleep habits may correct the problem without the need for medications. Good sleep habits should include: regular sleep times; comfortable bed and quiet room at a comfortable temperature; appropriate lighting; regular exercise but not close to bedtime or late in the evening; a bedroom that is not used for work or other activities that are not related to sleep; avoidance of stimulants like caffeine, tobacco, alcohol, and large meals close to bedtime; and relaxation techniques such as breathing exercises.