Organizing by genre?

I saw a post on this yesterday at Mean Old Library Teacher about organizing fiction by genre.  Imagine that!  Bucking the system.  But I am really considering it.  But I just don't know how to make that leap.  Let's do a list, shall we?

• How do you figure out what genre it belongs in?
• What do you do with books that belong in different genres?
• Would this really make that big of difference in my small collection?
• How do I begin this project? 
• What steps are there to take?
• How will I be able to accomplish this next year, with less time in the library?
• Again, is it really worth it?
• What genres do you use?
• When I order new books I have them labeled for me, will they label by genre?  Or do I have to make the labels myself?

I LOVE the idea so much because this is how kids find books.  This is how it's set up in the real world and am I not trying to prepare them for the real world?  And it would help when kids ask me where the mysteries are...on any genre.  Talk about it and let me know...should I attempt this?  YIKES!