Create a new universe where Equestria is real. The universe could use a little friendship and tolerance.
First though, I'd create a world where my friends and family could be, away from all of the problems here. If I'm godlike in power, I can simply transport people there from here, I'm not using my power here, I'm using it there to influence here.
If I can't do the above, I'd take the money, buy some nice guns because I like to shoot, build myself a nice house on a good amount of property, get my website off the ground and start working to make a difference i the world. I'd also build a shooting range on my property. I'd also give my friend that has cancer enough money to get treated, and if the treatment doesn't work, I'd help provide for his family.
What money I don't spend on all of that, which would be the VAST majority of it, would go towards paying off the US debt, producing things here, and generally being decent with it. I'd put away enough for my kid(s) to go to college and some on the side for them if something happens to me. I'll not have my children become lazy just because I have a ton of money. I'd still work, and I'd try to stay out of the spotlight as much as I could, even telling the government that I'd pay off the national debt if I didn't have to pay taxes for the rest of my life. I think that's a fair trade, but I'd also want them to keep my name out of it when they say that they got rid of the debt.
I think that's fair. XD