I recently answered a question requesting three pieces of advice for making a living writing romance novels. Here is my answer:

1. Read, read, read the best sellers in the kind of romances you wish to write. There are many, many sub-genres in the romance field and each has its own requirements. Then jot down between 5 and 10 things that each romance has and when you sit down to write make sure that each book you write includes those same things.
2. Read the requirements of the publishers of the sub-genre you wish to write in and make sure you have those requirements in each book you write.
3. Choose one best-selling writer in your chosen sub-genre and figure out how they wrote. Then copy them. Don’t worry about being called a copy-cat because your own writing will be sufficiently different from everyone else’s.