Will be buying tix today.
I'd do the usual, pay of debts, secure college funds for my kids and nieces/nephews, travel, another house where DH is from. Both my parents have passed away so I'd take care of their brothers/sisters (although I might have to go into hiding from a couple of them lol), and MIL/FIL. Charitable donations, start a foundation although I don't know what the focus would be.
Last night I also decided I'd buy the New England Patriots. But Bob Kraft probably already has this much money so that seems unlikely.