I'd get the million dollars in one dollar bills. Head down to the beach, make a giant pile, dump some gasoline on it, and have the world's most expensive bonfire.
I'd then post the video of it on youtube, which would be sure to go viral and get millions and millions of views. And then - profit! That's how viral videos work, right?
This may be of interest to you: http://en.wikipedia.org/wiki/K_Foundation_Burn_a_Million_Quid
But anyway, I can't imagine how socking some money away as living expenses, so I could quit my dayjob, would NOT benefit my creative career! Other than that, studio upgrades and book some proper orchestral sessions. Maybe even go back to school for film composition (can't hurt, particularly for learning the business/networking end of things!) Pay some folks around here to do some music videos for my band. Maybe even get some films for projection during live shows. And go on tour!
Oh, and flattered to be added to richy's list, of course