Frequently Asked Questions - hot topics
The best advice is to always write what you know. Write where your heart is.
If this is not possible, because you are in a position where you MUST write about something else, research is the only option. I mean, this is what journalists and serial novelists do all the time. Yet, again, if you have the luxury to pick a topic at least pick something about which you have a good feeling. That way you may bring that magical element, a fresh outlook and new passion--things that readers notice very quickly.
Solid research matures your approach and viewpoints.