Perhaps the worst part of early sobriety for me was the insomnia. And I had baseline insomnia anyways so getting my sleep cycle straightened out was very important. One thing that helped is I just told myself that not getting enough sleep wasn't going to kill me. Yes, it made me feel like crap sometimes, but I knew I had to find a way through it without using. One of the best things I have found to combat insomnia is to just start getting up earlier and staying up, even if I feel tired. Also, stay busy throughout the day. Also, if there is something "hanging over my head" that is bothering me, take a look at those things and problem solve to get them resolved. If there is something going on in my life that is robbing me of peace, figure out what that is and DO something about it. But, truly, the longer you stay sober the better shape your brain will be in and your sleep cycle should get better.