Not sure if it's been mentioned, but new studies show that light plays a big role in our internal clocks. Spend the 2-3 hours before bedtime in as dark and calm a setting as you can. Avoid TV, computer and other bright screens... If you have to be at a screen, try sunglasses. Sounds silly, but it's proven to help adjust inner clocks even quickly to sever jet lag. As soon as you wake up for the day, try to stay in as bright a setting as possible. Avoid sunglasses if you can for the first 6 hours. hope this helps.
Good luck!