Yea.. meditation is really good, sounds sab but it work.. but have headphones in and search… mr theta binary beats on you tube.. these help with addiction and sleep.
Also.. i some times do a 1 month calender and put on each day differents task.. eg.. gym, walk, read abook, decorate, meditate, listen to podcast. And tick each day off when its done each day. This is good to have goals. And keeps you busy.
Reading helps aswell. He needs to tell him self each day.. just stay clean for today and dont plan too far ahead. Eat healthy as well.