You should rinse your toothbrush with tap water after brushing to remove any remaining toothpaste and debris. Store the brush in an upright position if possible and allow it to air dry until using it again. If more than one toothbrush is stored in the same location, keep the toothbrushes separate to avoid cross-contamination. Do not routinely cover toothbrushes or store them in closed containers. A moist environment, such as a closed container, is more conducive to the growth of microorganisms than the open air.
Here are some fun storage solutions that follow the ADA's suggestions.
Here are a few mason jar toothbrush holders above and below. If you don't like them on the wall, you could store them this way under the sink, in a drawer, or on the counter. Good old fashioned cups work well also!
This one takes the price for most creative...and most manly!
How do you store your toothbrushes?