How To Overcome 'Entrepreneur Insomnia'

Every night after my "day job" I go home, make dinner, spend time with my family, and do the housework. By the time that is done it is 8 PM and it's time for me to get to work at my other job. I tell myself each time that I will not stay up until the wee hours of the night again, but it never fails. Even if I leave the computer and go lay down, my mind won't stop running, and before I know it 1 AM rolls around. When you have to get up at 6 every morning, it gets exhausting trying to function off...