Simplifying visually makes storage areas look neat and attractive. Place soaps of different sizes but in the same color family in a clear vase. Regular bar soaps out of their wrappers works just as well as expensive decorative bars. Ours on the top shelf look nice and are convenient.
Stack towels and washcloths by color to keep a uniform look. If you have a lot of colors try placing in a basket that works with your color scheme. Bottles of bath salts and fragrances are great accents. Their shapes are a nice compliment to the square stacks.