I've spent most of the last two weeks reading books outside of my genre, specifically the last two books of the Night's Dawn trilogy by Peter F Hamilton.
As good as the series is, 3000 pages is a bit long and it's not something that I'm going to do again in a hurry. What I did learn from it was not to have too many storylines going on at once as you have to wrap them up at the end.
Hamilton had at least six going on, and those just were the ones that were still going at the end of the trilogy, and each of them had to be wrapped up neatly. It took him nearly 200 pages.
When you have multiple story lines that come together in one place at the end, this is not necessarily a problem, but when they all end in different places, then it becomes hard. I wasn't surprised to learn that the whole trilogy took over 6 years to write.
So, the thought for your WIP this weekend is, do you have too many plotlines going on in your book that will finish in different places at the end?
p.s. The trilogy suffered from 'male sex writing': Lots of times per night with the woman always satisfied.