In the evenings when its warm out, I try to walk in the park near where I live. I will walk about a mile almost every day. This will help me sleep since then I will have a reason to be tired. It usually works for me. Maybe it would help your husband too. Another thing to try would be to stick to a routine. Develop a schedule for going to bed at the same time every night and get up the same time in the mornings. Hope it helps.