When I first started writing, I had six books I was juggling. Depending on my mood, I’d write a little on one of them each day. That went on for a long time, but I didn't seem to ever get to "the end" with any of the books. Realizing I was never going to get a book ready for print until I choose one book to concentrate on, I picked the book most likely to be finished first (and the one that was the most fun). After that, I worked on just Knitting Up a Murder and nothing else until that book was ready to be published.
If you find that you are dealing with a lot of book projects at once, try focusing on just one. Don't throw away your other works. Put them on the back burner, so you can concentrate on having your first success. If an idea pops into your head about one of the other books, record it somewhere for future use and return to the project at hand.
As a writer, you will have lots of book ideas floating around in your head. Find a way to corral those ideas, so they don't stop that first success from shining through.
----Celeste Bennett, Author of the Yarn Genie Mysteries