1st: if you dont already have one, get a lawyer.
2nd: have him set up a BLIND TRUST, or other suitable corporation. nobody needs to know its YOU who won.
3rd: always take the annual payments. 90% of people who get lump sums burn through it like the sun was in their pocket. if you get 30 payments and fuck up the firs few, you got 27 more chances AND YEARS to get it right. somewhere between year 1 and 30 you should've gotten some sense.
4th: take your time, look around, find people who can help you make good tax shelter, savings and spending plans.
if i won no onw would EVER know, cause i wouldnt be outlandish with mine.
I would take the lump sum because if you die after the 3rd payment the lottery gets to keep the rest of the money. You can't pass it on to relatives or even your wife. If you die that's it.