It is true that, at least in the US, lottery winners typically do not do well with their winnings. Every charity comes around looking for a handout. Shady investors, etc, etc.
If I ever won, my lawyer would pick everything up and transfer it to my holdings. From there I would chat with my financial/tax consultant about tax shelters and retirement funds. Then I would get a referral to someone who deals with the money markets (and double check with a friend of mine who is involved in them) and set up a number of investments. Then I would pay off the house, the car, and any outstanding debt. I would keep working.
If anything was left over it would then go for surgery. Protect the future, deal with the here and now. Plan nice vacations each year. Try to live on whatever interest my investments generate. Help those who have been good, close friends.
IMHO. YMMV. And all other disclaimers that I might think of with this subject.