Then I have to make sure the research doesn't take over the book. Left to my own devices, there would only be the character scenes. I actually write a lot more of them than appear in every book. They get cut to keep the pace going. And sometimes I miss them later.
Balance is all, and it's very tricky.
Even my best fans complain when they think I didn't get something right. Read, read, read, read. Write short stories. Listen to people talk. Practice, practice, practice.