Just the facts.....Please!!!
There is nothing worse than reading about something you know is not true and find out the writer did not do any research. It can make your readers lose interest in the rest of the book.
When writing about places, professions, or topics, in relation to a character or group of characters, do some research and put some true facts surrounding those characters. This will add some credibility to your writing style and give the storyline more depth. Remember, just the facts, might be what you need to take your story in a new direction.