I would pay all of my close relatives out of any debts they might have, first. Then make sure that they all had reliable automobiles, and if necessary a home of their own.
After that, it would be divided into different funds. My husband's grandkids would all receive a trust fund that their parent's couldn't blow. There would be an allotment for charity, a fund for college, a fund only for medical emergencies. We would remodel our little, old farmhouse. ( we could finally afford a new screen door, yay!). My husband would be able to start his motorcycle business. I would be able to kick around and write without the pressure of worrying about bills.
The remainder would be stuck in the bank where we could use it when we wanted or needed it. And we would pretty much live the same as always, except without worrying about the bills. And I would still dicker with old women at yard sales over the price of used books.
I don't think it is the money that ruins a person's life. I think a person ruins their life by how they choose to spend their wealth. I have a lot of friends that are very wealthy. Oil money. You wouldn't know it if you met them. They get their hands dirty working everyday. They drive old trucks, and wear jeans. One of the ladies here in town received a several million dollar inheritance. She lives in a double-wide mobile home and drives a Toyota. She spends her time volunteering with various charities.
If a person is vain, and just wants to impress people with how rich they are, then yeah...their life will be ruined. The money will disappear and the only thing left to show for it will be a bunch of memories and bills.