If I won a big payoff like $500 million I would continue to live as I do, but move out of California. And I would see to my wife's future and my daughter's education and future (like today, but mo better.)
The bulk of my money would be used to form a foundation, hopefully chaired by my daughter eventually, whose sole purpose was to provide scholarships for the children of men and women killed in action and assistance to the families to help them get back on their feet.
I would also open several bars and strip clubs that feature a monthly military appreciation day, where drinks and lap dances are free to people in the military and the bartenders and girls are prohibited from accepting tips that day. I would make it up to them, however.
The military appreciation day would probably piss off some people, but hey, it's my money.