Well after the usual friends/family/charity nonsense, I would..............
Try not to go berserk
In reality, you would sit pondering. 'which aircraft', have a post on pprune extoling the virtues of every type imaginable, speak to some experts, who would put you off, go back to your personal pref, then haggle a dealer on best price.
The beauty of that type of money is frankly, you no longer worry about anything, including your choice of transport
Dreaming though, a fractional share in a G6, with a nice house in the Bahamas, and a new G36 sitting in its air cond hangar.