|There are a number of things you can do to control litter box odor.
Clean litter box regularly
Clean the litter box at least once a day and change the litter at least once a week. Although it is never going to be on your list of 'My Favorite Things to Do,' removing the waste and changing the litter is often the best way to control odors.
Ventilate the area
Place the litter box in a well-ventilated area, in a room with a window you can leave partially open would be best.
Add more litter boxes
If you have more than one cat, consider getting more litter boxes. The general rule is to have one more litter box than the number of cats in the household.
Use a deodorizer
Add baking soda, or better yet, add an enzyme product such as Nature's Miracle Litter Treatment to the litter. The Nature's Miracle uses natural enzymes that actually 'eat' the odor-causing bacteria.
Use a product like Pet-Clear Crystals to eliminate odor from the air. You may also want to consider installing an automatic air deodorizer.
Get a self-cleaning box
Consider investing in a self-cleaning litter box. These completely automatic boxes rake away waste into a self-contained bag 10 minutes after your cat leaves the litter box. They are a little pricey, but if you hate or are unable to clean the litter box regularly and want to keep your home odor-free, this is the best solution on the market.