In a small foyer maximize the light and make a tight area feel less cramped with a floor to ceiling mirror. Your foyer may be a tiny space with only a coat closet and no place to hang a mirror. So why not mirror the closet door! This will make your space appear larger. Depending on how your closet door is positioned, it may double a gorgeous view of the outdoors.
If you are using a pricey rug in your entry. Do what I do. Protect it with a small washable throw rug. Covering the spot most traveled on a daily basis. Then for special occasions stow the throw rug in the closet. Meanwhile, the better rug will stay clean. No space for a rug? Paint an interesting design on the floor. There are a wide variety of stencils that you can use if you do not consider yourself an artist. Be sure to use a sealer topcoat to ensure your painted design holds up to heavy traffic and will clean up easily.