<human>: My husband has been having trouble sleeping. What can he do?
<bot>: He could try to establish a consistent sleep schedule and practice relaxation techniques such as deep breathing or progressive muscle relaxation. He could also try to avoid caffeine and nicotine late in the day, as these can interfere with his ability to fall asleep. Additionally, it might help to reduce the amount of light exposure before bedtime, as bright lights can make it harder for him to relax and fall asleep.