replace my family's cars, pay off my brother's college debts, then buy myself an Audi A4. I'd then buy my own old, de-militarized fighter jet (check it, you can buy them) just because i would love to be able to just go fly around. I'd buy my parents a house in the south of France, and i'd buy myself a nice house, nothing immensely huge, just a nice house. Give some to charity too
Then i'd save the rest, and i think i'd get a good part time job. The job part might sound stupid, but i think i would get bored of sitting around just being rich. You gotta have something to do. My biggest effort would be to not become a rich douchebag, i'd rather be one of those people thats like "yea, i got lucky and won a ton of money, so what. I'm still a person, just like anyone else"
one last thing, i think i'd find some random person who looked less fortunate and the street and just give him like a a grand or two. Why not make someone's day a little bit better?