How does cognitive behavioral therapy help improve sleep? —V.L.J., Union City, Calif.

The therapy teaches you to change the thoughts and behaviors that may contribute to poor sleep. Cognitive strategies you learn might include designating a certain time of day for addressing worries and concerns so you can put them aside at bedtime, or using mind-body techniques such as guided imagery to help you wind down. Behavioral techniques might include avoiding naps; using your bed for sleep or sex only; going to bed and waking at the same time each day; and getting up and doing something relaxing if you can’t fall asleep. You might also modify your sleep area by installing light-blocking curtains, playing soft music, or using a sound machine to drown out noise.