I know this sounds all holier-than-thou, but in all honesty, if I won that kind of money, the four things I'd do are fix up my house, then create 2 scholarships, one to study medicine and one to study engineering, in memory of my parents, and the rest I'd invest in housing and try to use income to invest in people as well as spending it on myself. The interest off that sort of money is more than I'd need to live on, and I know a lot of people trapped in a cycle of bare-bones finances because they can't get a better job because they don't have the training and they can't get the training because they can't spare the money because they can't get a better job.
Mamma's death let me do something for a friend I've been wanting to do for years; she works as a domicilary carer, that is she goes to the homes of the elderly and infirm, and bathes them, administers medication, does shopping for them, stuff like that. She's on the lowest wage someone doing her job can be, because although she has 12 years of experience, she doesn't have any paper qualifications. To get the basic qualification, which will add 50% to her wages, only costs $2,000, but because her budget is absolutely sking of the teeth tight, she just couldn't afford it. The money I received from Mamma's will let me lend her that 2k, and she's studying now. In 2 months time because she'll have the paper, her work is giving her a permanent contract on much higher wages, and she's already being head-hunted by other companies based on her reputation. She's one of my best friends and I'm glad I finally got to help her out this way.
So yeah, I'd like to be able to do that a lot more often.

I'd still be spending money on travelling and the like, but there's only so much money you really need to spend on yourself before it becomes just more stuff. Sorry if that sounds pretentious.
Why treat life as a journey to the grave with the intention of arriving in an attractive & well-preserved body? Get there by skidding in sideways, a glass of wine in one hand, chocolate in the other, body totally worn out, screaming WOOHOO! What a ride!