How Do You Keep Your House from smelling like cats!

We have 2 cats and our house doesn't smell like cats. Use a good cat litter - we use Arm & Hammer Multicat - and change it often. Scoop it every day and completely replace it once a month. Make sure if they throw up or use the bathroom anywhere they are not suppose to you clean it up ASAP and deodarize the area. Open your windows every opportunity you have to get freah air in. Also change the air filters in your A/C and heater. They can trap smells and a ton of dust (should be done monthly).