Well if it's a big payday, I'd probably do this:
-Pay off my truck, then sell it for a little more cash
-Get a Silverado or something close to it and go to town on it, West Coast Choppers style
-Get a house somewhere and start a nice little basement grow with lotsa strains.
-Put the rest in a trust fund or throw some of it into the stock market with the help of my all-knowing grandfather and let her grow
-Other than that, just lead a normal life for now, maybe an expensive vacation every year, but that's it. I'll save most of the traveling for when I'm retired. Then I can spend my winnings.