Splash out on a dream holiday perhaps? Or squirrel the money away and continue life as usual?
Or would you have a good, long think about things and after you had finished "shopping", buy the company you worked for?
That's what one former lorry driver in his fifties from northwestern France did after he hit the jackpot.
Screenshot from La Française des Jeux commercial
"Alexandre", the man who prefers to "guard his anonymity" as the national daily Aujourd'hui en France - Le Parisien puts it, won €10 million in the French Loto last September.
When the road haulage company for which he worked was threatened with liquidation, he stepped in and bought it, becoming the new CEO and therefore the boss of his former boss.
Into the bargain he also saved the jobs of more than a dozen employees.
"I had the means to invest and save jobs, and it's a world I know well. In fact it has been my life," he said
"That's not something you can give up from one day to another."
His decision was not a rash one based on sentimentality.
He only took over the assets of the company as well as a portfolio of clients and a dozen lorries, and not the liabilities or debts.
"If I see we're losing too much money, then I'll quit," he warns.
But for now he wants to "develop business and create more jobs."
As well as an apparent "nose for business" he also threw in a little retail therapy for good measure, buying a couple of houses and a 4X4.
That was the extent of his spending spree though, as he has also taken on an investment advisor and continues to play the Loto "just in case".
La Française des Jeux, the operator of the Loto, told Agence France Presse that as far as it knew this was the first time a winner had bought the company for which he or she had previously worked.
Alexandre was one of two men from the same part of France who had separate wins in two different lotteries last September.
The other man, also in his fifties and a lorry driver, picked up €15 million in the pan-European lottery EuroMillions.
Once a lorry driver, always a lorry driver - albeit a wealthy one.