1. Youve changed your phone number.
2. Hired a lawyer.
3. Get a P.O. Box to serve as your official address.
4. If you plan any major life change (a wedding, quit your job, etc.), do it BEFORE you turn in your winning ticket.
I remember reading about a guy who filed for divorce after he won the lottery, but before he submitted the ticket. He kept his wife in the dark about winning the lottery. She found out after the divorce, sued and won half the money. Good for her!