How to Train Your Cat to go into the Litter Box
Housetraining Your Cat
House training a cat to go into the litter box is not hard to do, but it does take some patience and consistency. You first have to decide what type of litter and litter box your cat will use. Make sure to get one with high sides so when your cat scratches in the litter it won't fall over the edges. I prefer one with a lid, it makes it much cleaner. You will also want a scoop to dispose of the poo when you clean it out.
To train your cat wait until you see him/her either looking for a place to go and starts squatting. Grab the cat quickly by the back of the neck and place it in the litter box. The reason you want to do this is it simulates a Mother cat picking it up. It does not hurt your cat at all but let it know you're in charge.
What to do if Your Cat Goes Pee or Poo on the Floor
In most cases you don't catch your cat before he/she goes on the floor. You usually find the mess on the floor. If this happens, pick your cat up by the neck and take him/her to the mess. Put the cats nose right next to it and tell them "no" several times and then carry it to the litter box and put it in it. Do this every time your cat goes on the floor and in no time your cat will be house trained.