I wouldn't benefit from the money for at least a year.
The first thing I'd do is put the unsigned ticket in my safety deposit box and KEEP MY MOUTH SHUT. I wouldn't even tell my own mother before the trusts were drafted and recorded, so my second action would be to show up at my attorney's office unannounced (I love doing this and, when he complains that he doesn't have time to see me, I just ask if he has time to refund my entire retainer. Somehow, magically, a slot always opens up).
Once the trusts are live, I can hire a financial planner to oversee them for me.
The last step is to await the coming year and collect the interest payments. 50% for me, 50% for various pet charities (not dogs and cats; I mean those organizations I'm personally fond of). Donating half my income to charity negates the 15% cap on long-term capital gains, so my net federal income tax on subsequent perpetual interest payments is zero.
I would never touch the principal.
The above outline assumes a major advertised jackpot win of $80M or more. A trust capitalized at $30 million will earn well over a million dollars a year, but this plan wouldn't be practical if the cash value of the jackpot was $5 million or less. For a windfall of this size, I still wouldn't touch the principal, but I'd have to pay federal taxes on my $300,000.00 income, because I'd live on half of it and reinvest the remainder until I had accumulated at least twenty million dollars. At this point the charities would certainly get a portion, maybe 30% and, as my fortune approched the $30M benchmark, their share would increase exponentially.
Spending time trying to figure out how to spend found money is futile. Any jackpot that's ever been won has had a real dollar amount attached to it, meaning you have won a finite amount of money. Just because it's more than you've ever seen is no indication that it will last forever without proper investment planning and self-discipline.
That roll (or wad, if you prefer) of ones, fives, tens and twentys most of us carry around is NOT money; it's only the representation of a concept utilized to place standard values on goods and services available for sale or for hire. Look at any bill in your pocket. You'll see the following words: "This note is legal tender for all debts, public and private." Put more simply, it's a promissory note issued by your government, and its current value is determined by daily comprisons to foreign currencies in an ever-increasing global market.
Money is an intangible vehicle with which to make more money. Period. Once spent, it's gone; once invested, it keeps coming back, year after year after year...
I've said it before, but it bears repeating here: If you can't effectively manage the money you're earning now, odds are you'll blow your winnings on good times and temporary fast friends. If you use your head and develop the ability to tell yourself, and everyone else you speak to, "No," your windfall will be sufficient to see you through your remaining years, and you'll be able to leave something behind for your heirs, namely, the original jackpot money, or principal.
If you don't like your kids, or if they've pissed you off somehow, you can leave the money to your favorite university, fund a perpetual grant program bearing your name or bury the money out-of-state and take the location of your stash to your grave, thereby insuring the physical fitness of your children throughout their lives as they search and dig for their legacy.
Whatever you decide, have fun with it.