There are a few things you can do to help sleep in a moving car. First, make sure you have a comfortable sleeping position. Second, make sure your car is cool and dark. Third, try to relax and get some rest. Fourth, if you can, try to avoid using the phone or other electronic devices during the night. Fifth, be prepared for the next day by getting up and getting some breakfast or lunch before leaving your car. Sixth, be sure to keep your car clean and free of any debris that may cause you problems in the morning.