I'd not quit my job, because I'd not be able to live my entire life off that.
I'd still go to work, but on the first day I'd acquire that money, I'd buy a new house, a new car, lots of technology (new computer, all consoles), buy a shitlot of beautiful furniture, a lot of games.
Then, if there'd be any more money, I'd save it for future consoles and games. And food.
Also, I'd buy a lot of clothes. I'm in dire need of more clothes than I currently have (well, mostly shoes, I have plenty of other clothes).