Choosing a litter box is one of the most underrated decisions you will make as a cat owner. Covered or open litter box? Manual or automatic litterbox? Scented or unscented litter box? While many people choose litter boxes (and cat litter) based on their own preferences, it’s vital to keep in mind that your cat’s preferences are the deciding factor in whether or not he or she will use it. Also, if you have more than one cat, you should have extra litter boxes to avoid problems. The rule of thumb is to have n + 1 box in the house, where n = the number of cats.
Cats are generally fastidious, but they can get sick or make messes just like everyone else. There are plenty of cleaning supplies on the market, depending on your flooring and your preferences. Choose a product labeled "pet safe" to ensure the product is non-toxic when ingested. Enzymatic cleaners, which specifically break down proteins such as the ones found in urine, are very helpful for those house training and spraying incidents.