Hide it away in many different places. I would take about 10 dollars of it and go to an Asian buffet with a friend I meet on Friday and then make some financial plans to do with it while eating. :3
Actually I would buy a studio with the best equipment for recording and I would buy copyrights on a bunch of instrumentals. Then I would go to school to learn philosophy, psychology and get an PhD in English
If I won I will contribute half of the sum to Charity to help suffering children in Serya. One Third to Build a Children's Village in my country Post war Sierra leone. The Rest will remain in my account for personal empowerment.