Claim the ticket and receive my check, take care of all the media crap, find a top notch lawyer, accountant, financial advisor and mentor (most likely my millionaire uncle) and then take off with them for a few weeks down south and plan everything one by one on.
When I get back with my newly formed "wealth team", I would stay low key and buy a decent sized house on a golf course in Ile-Bizard (living on a golf course is a dream of mine) and start investing/buying what I need and want.
I would only share with immediate family and not too much with extended family and friends because that is where problems start and I wouldn't flaunt what I have and buy a Ferrari in every color, a ship, a plane, a helicopter and gold/diamond teeth.