I found a large apothecary jar and filled it with bits and bobs of sparkly pieces. It didn't really matter what the pieces were, just that they sparkled.
It was a large piece, so I put it on the center bookshelf (plus that's the only shelf it fit on).
Here are a few of my favorite things. They're styled the way many people like them; almost symmetrically. Minimal fuss, even, and simple.
I, of course, like LOTS more STUFF! More fluff, more things, more, more, MORE!
1. Vary the height of your objects (try using books to lift things).
2. Choose one basic element for your objects . For instance, don't use glass, pottery, wire, wood, silver-plate, fabric, and your fine china. I used primarily glass and paper items.
3. Pick one color and use it primarily with another color or two to accent (white, black and beige were the colors I stuck to). Sparkle doesn't count as a color!
4. Group things together. The tendency is to line things up like soldiers or flowers on the windowsill.
5. Find and use unique items. This is the time to use that huge shell you picked up on vacation or the cool squatty bottle you found.
6. Incorporate beautifully framed family photos.
7. Think of your shelves like they are teeter-totters; everything should visually balance. Continually step back to check if the shelves appear too "heavy" on one side (or too "light").
Remember; once you know the rules, you can break them!