There has been a lot of news here in the U.K about horse meat being sold as beef. I'm not going to get all political etc., I know people do eat horse meat. That's not the problem. The problem is that people are being sold something different to what they expected. What was on the label isn't what is inside the package.
Why am I talking about horse meat being sold as beef? I started thinking about writing (I love that pretty much anything can be related to writing *grin*).
The fact is that, when writing, it's important to know what your product/novel is. You know your story. You know your characters. You've spent time on the plot. You might know all these things, but do you know your genre? What will a reader (or agent) expect to get when they pick up the book/query?
We know genre can be tricky. Genre's can be combined. Genre's can be invented. Not sure what genre you are writing in? Spend some time researching. Compare your book with already published novels in that genre and see if your book would sit alongside them on the Sci-Fi/Romance/Fantasy shelf.
There's always the temptation to try to fit your novel into the genre of the moment, but spend the time getting right before putting your completed novel out there. Only then will everyone know what they're getting without compromising your finished novel/product.
What genre are you writing at the moment?