Today's window display is a lesson on a tried and true Principle of Design...repetition.
White roses and rolled napkins carry on the repetition of the wires that make up that guilded bird cage.
There's a couple things happening here. Let's examine them.
1) That cage might be a showstopper in itself, but pairing it with other objects give it more presence and importance.
2) A single rose or napkin would be beautiful, but using a group of them - repeating the color and shape - really catch your eye and make you notice them.
Incorporating these ideas into your decor will give your vignette or space more importance.
1) group items together and...
2) use multiples
Give it a try.