If I were god for a day, the first thing I'd do is make it so I'd be god forever. The second thing I'd do, is get my own chat show. Why? Because one of the main problems with gods these days is that nobody really knows what they want, so everybody says they want something different. And then people kill each other over this bullshit.
So, I will have my own show, like Jesus and Pals, and I'd say it like it really is. That way nobody can go around claiming they know what I think.