Eating some carbs in the evening might be helpful too. If your liver has enough glycogen (stored sugar), your body won’t need to produce stress hormones to create sugar. Many people on “paleo” diets moan of sleep troubles, since they don’t eat many carbs at all and often work out, so it’s likely they have little glycogen available. Another supplement I’ve heard helps for sleep and anxiety is taurine. I’ve never looked it up though.