I would first find a good lawyer to set up protections so I wouldn't be swindled by all the people who will all of sudden become my best friend.
Then set up some good investment accounts. and let it set for awhile until all the publicity went down.
It's so easy to fall into the trap that so many lottery winners get into, buy the fancy houses and new cars for everyone and then within a few years have to file for bankruptcy.
It seems that the ones who keep it are the ones who maintain their current lifestyle, pay off the bills and continue to work.
I'd like to help my sister pay off her lake house. She wouldn't have bought it without my saying 'it's a really good deal' so I feel guiilty that the property values tanked a year after they bought it.
I'd donate some to the charities I believe in.
But after that I do have a list of things I want. Dh and I have discussions of our wish lists, the are labeled "some day" and "when we win the lottery." "some day" means we are actively saving for it. And "when we win the lottery" are things that are just for fun:
I want:
one of those super duper massage chairs, with the foot and lower leg massaging unit from Sharper Image.
a table with heat and rolling bars that my chiropractor has in his office-it's almost worth having a back spasm to lay on that thing for 30 minutes.
a super duper delux LA machine with all the bells and whistles complete with in home set up and a personal instructor to teach me how to use my machine the way I'll need to use it.