The key to a good-looking bookcase is making sure there is enough dimension. Also, wallpapering the back of the shelves doesn't hurt, either.
How to beautifully style built-ins or bookcases | Rooms FOR Rent Blog
How to Style a Bookcase. While these items aren't necessarily what would go with your decor, they show how to use a nice variety of items to style a bookcase. Your eye wants to bounce around and see everything!
Bachman's 2016 Holiday Ideas House- Itsy Bits And Pieces
I love the idea of a short bookshelf to divide a room without closing it in. Plus, it gives you some display space on top! Great use of space!