As writers we sometimes run into the issue of having to create more than one storyline. Authors such as Jim Butcher, Glen Cook and John DeChancie (yes, I am prejudiced toward writers of fantasy) have all done this. We listen to the voices, you see.
My epic fantasy series, The Milward Chronicles was begun over 10 years ago. Over the decade I have come to know the personalities of every character in the books as if they were family. Of course, familiarity breeds contempt, or in my case, boredom. I decided to start another book not even distantly related to the style of The Chronicles. The Tony Mandolin series, which has a number of posts on this blog, is written first person and with decidedly more outright humor than the semi-serious tone of The Chronicles. Yes, I admit it, I cannot keep a straight face throughout an entire book.
So, what this did is it split my attentions and a book that should have taken no more than two years to complete has now gone on for four, but in that time I have been able to write two books in the other series (which you should seriously check out), begin the third and plot out a completed outline for Angbar. If you cannot wait, I will post a couple more chapters as I go, but I have to have requests to do so. An author cannot produce if the interest isn’t there. Consider it a personality flaw.