Serious: Before I did anything I'd hire psychological experts to figure out how to mitigate the damage that we would be done by telling all those people they'd wasted their lives on a lie. I would hire financial experts to figure out how to best use the assets of the WTBS to mitigate the damage caused by all those wasted lives. Then I'd do what they suggested. I'd probably hire a bunch of people from places like this board to help explain it all.
Not so serious: I'd use the printing presses to print zillions of copies of my novels and I'd tell everybody they had to sell them. Hey, it worked for L. Ron Hubbard.