First thing I would do is keep it quiet. I would not tell anyone except my mother and my wife. Assemble a team consisting of Lawyer, Accountant, Financial Advisors, etc. I need to make sure this many would last for the long run. I would never let it be known to any of my family the outside of my wife and my mother that I was given 100 million dollars. I would give money to my family but it would because my business is doing well, I had a good year so I would share my financial success, Maybe like 5000 to each Close family member. I would not go and buy a mansion, I would buy a decent size house that is descent to believe without people suspecting anything. I buy a car for my wife, 2015 Lexus R 450, then maybe 3-4 months later a 2015 S-Class 550 for myself. I would not go out and buy a Bentley or a roll royce, It draws too much attention. I would donate some to my church but anonymously so the members wont be in my business. I dont want pastor to start treating me different because I gave a large some of money. I would definitely put a will together to take care of my family in case of emergency. I would invest in safe stock, no aggressive investing. I would get into the real estate investing. My business would be the face of my wealth and not the 100 million. I would not even tell my wife or my mother I won 100 million, I would tell them I won 25 million instead. Thats how I would deal with 100 million