Rule #3
Write about something you don’t know. Admit it. You don’t know everything. Nobody knows everything! There will always be something out there that’s new to you. If it’s totally new to you, it’s also probably totally new to a lot of other people. You could be filling up a niche. Who knows? It’s a great challenge to see how much you can write about something you don’t know. How do you go about it? Simple. Research.