I normally screw mine into a ball and let it roll around the cockpit floor. Then you can pick it up and use it as a globe. Makes drawing straight lines on it a bit difficult though.
But seriously.... there is a good way of doing it but I am not familiar with the method. It should leave you with your most regularly flown area predominent and the ability to 'fold out' the legend bit that has the aerodrome frequencies on it as needed.
Maybe its part of the CPL syllabus?
Regards