I've done that plenty of times.
The very next day I would hire a limo for the day, go into work, pack up my stuff and officially retire.
Then I would get a team together (lawyer, financial advisor, accountant, etc...) to set up my plans for the future before I actually claimed the ticket. I would take a few months to prepare. I might have to live on credit cards until I actually get my payout but it would be worth it. The people that win big and blow it all within a few years are the ones that don't have a plan.
When I got the money I would pay off all my debt, which currently is just a house, a couple of cars and a 32 ft camper. Then I would fix up my current house and either sell it or rent it out. I'd buy a new house and probably a few toys like cars, motorcycles, jetskis, etc... Probably buy new houses for my parents and my in-laws as well.
When my kids are out for summer vacation I'd take my camper and travel around the country. Maybe visit all the sports stadiums at least once. When they are in school I'd do all the things I don't have time for now. Like joining some softball and bowling leages. Maybe get some season tickets for a few of the Chicago teams.
If had had enough, I'd actually like to buy the campgrounds we currently camp at. It's nice enough but it needs somebody to come in and invest some money into it. If I won anything over 100 million I'd probably have no problem doing that.
I think I could retire on as little as 5 million. I probably couldn't do all the stuff I mentioned above, but I think it would be enough so that I would never need to work again.