Well, not much we can do about it aside from casting our vote and watching our country burn. Tbf, though, I don't think either candidate would do as much damage as people think they would. It's not so fragile a system that one person can completely upend the country.
I'm planning to vote, but I can't stand either candidate. My plan's to vote in republican senators and Hillary Clinton, and watch them gridlock each other. And honestly, both candidates are so old I'd be shocked if either one of them survived a year in office... we might as well be voting for their vice presidents.