At 500 million I would split it between my Family and Tracey's.. Trust funds for all the kids.. Pay off all of the immediatte families debt(s).. invest and live off of the interest.
If I invested just 50 million of it, and lived off of 10% interest, I'd still be looking at over 400,000 a month to live on. What the hell would I do with 400K a month?
For work, I'd find a non-profit that could use my talents, and work for them with no compensation. I can't imagine life without some kind of work. Maybe the Bill Gates foundation. They do a LOT of good work.
Travel the world... and travel like I was still in my current state, not 5 star hotels.. but where the REAL people are.
I'd start an education trust fund where I could find my own scholarship recipients. People that I meet in my daily life that need help, smart people that got stuck in the daily grind of life. It would be more than just a scholarship, but a means to support them and their family while they got an education. Hire family members to manage it, and to help find and recruit needy people to help. They may have to travel the world also, looking for deserving smart people to help out.
I can't save all the starfish, but I just made a differnce for that one.