Plenty of sleep is a vital part of a healthy lifestyle. But most people have sleep problems at some point in their lives.

Here are common causes of insomnia, courtesy of the National Sleep Foundation:

* Stress, depression or problems in work or personal life.
* Drinking alcohol or caffeine late in the day.
* Exercising too close to bedtime.
* A distracting sleep environment — one that’s too bright, loud, or caused by sleeping near another person.
* Physical conditions, such as arthritis, backache or pregnancy.
* Certain medications, including steroids, decongestants, blood pressure drugs, asthma drugs and antidepressants.

– HealthDay; brudirect