If it is a mega jackpot, get a good attorney and try to be as incognito as possible. The sad fact is that, like some pro athletes, people are not equipped to manage that amount of money and friends, relatives, scam artists, etc. come after them endlessly. After about $200M in career earnings, Allen Iverson is bankrupt. The reality is that the winners trade one set of problems for another. But I could go for a change.
Sorry, enough of a downer.
Ok, first let's note that everyone living in SD has won the geographic lottery. Be happy for that! Try living elsewhere and you'll see.
With a lot of money, I would upgrade the housing for several family members and cover the college education of 5-6 little ones.
I'd probably upgrade housing in SD and buy a second place on Maui.
I think real estate can still be a good investment now.
I'd splurge some, for example, a luxury sedan and a convertible.
I'd travel more than planned after upgrading my bucket list.
And, of course, I'd go to Hawaii for a week, coincidentally at the same time as Goldie and her friends