Select picture frames that coordinate with the overall look of the home. Choose frames that are made of the same exact material, or are the same color. Another option is to select frames that are different, but are in coordinating colors. Choose frames in varying sizes, with some large, some small, some vertical and some horizontal.
Place your pictures inside your frames. Use either all color pictures or all black and white for a cohesive look.
Place the picture frames onto the shelf in groups of three, with each grouping featuring frames of varying shapes and sizes. Grouping the frames this way will give the shelf visual balance.
Add other items among your picture frame groupings. Choose things like candlesticks, stacks of books, vases or small plants.