Ok, so I'm an author. None of my books are published yet though. When I want to write, I use the first idea that comes in my head. Even if your hungry and your first thought is about a burger, write it. About three or four years ago, I watched and read the Harry Potter series. I loved it soooooo much. Even now, I still love the wizard idea. When my friend read Harry Potter for the first time I had the inspiration to write a story called Infinity about wizards. So, just write what you think about. I've written about 50 or 60 stories that way. I really hope this helps!!!