We all need privacy when going to the bathroom, cats are no different, therefore, placing the litter box in private area with minimal noise will encourage the cat to do his/her business. If you have other pets, different species, even having the litter box in a completely different room is ideal. From your cats and other guests point of view, the kitchen and or living room is not an ideal place. Perhaps the family bathroom is more ideal.
Having the litterbox too close to the food is not a good idea either 'cause cats by instinct learn to distance themselves from food and prefer different tasks in different locations as long as it is not the basement and or outside garage which can be uncomfortable for the cat, especially in winter.
Having multiple litter boxes is an advantage for house holds that house more than one cat. Kittens have less control over their bladders, therefore, multiple litter boxes is ideal.
Here are a few facts:
Did you know that mother's teach their kittens how to use the litter box!
Many people fear catching a protozoan disease, Toxoplasmosis, from cats. This disease can cause illness in the human, but more seriously, can cause birth defects in the unborn. Toxoplasmosis is a common disease, sometimes spread through the feces of cats. It is caused most often from eating raw or rare beef. Pregnant women and people with a depressed immune system should not touch the cat litter box.