Most remodelers tend to think of a single medicine cabinet over the sink. But with a little creativity, you can use additional medicine cabinets in other places in the small bathroom to provide both space and the light-reflecting property of the mirror to make the room look larger. For example, a larger medicine cabinet placed in a wall at one end of or behind a tub is a great place to store soaps, lotions, bubble bath, wash cloths and even towels. All the items needed for the bath can be in close proximity yet out of sight.
Organization is very important in a small bathroom. Creative use of nooks and crannies and recessing shelves and cabinets can conserve space, make the most of available space, and keep items close to where they will be used. There are many kinds of organizing units for drawers and for cabinets. If you are planning a custom vanity or shelves, you can insert whatever you wish in terms of dividers and such.