From this blog entry by J. Steven York:

“Rules da 8 – How Becoming Published Will Change Your Life

Rule da 8: When you make your first sale, your problems are only beginning.

Rule da 8.1: Publishers don’t buy books, they buy careers. If you aren’t thinking past your first book, you are of very little value to anyone. Pray the publisher forgets to ask.

Rule da 8.2: Wash, rinse, repeat. Repeating is the hard part.

Rule da 8.3: The only time a second book can be easier than the first book is when the second book is already written, and even there lie pitfalls.

Rule da 8.4: You can’t rest on your laurels unless you have some, and even then, laurels don’t pay the electric bill.

Rule da 8.5: Sharks gotta swim, writers gotta write. Sharks stop swimming, they die. What does this tell you about writers?”