Hold the food treat in your hand at nose level and lift it up and back over your cat’s head. As its head goes back to keep its nose in line with your hand, it will naturally sit. As it does so say ‘sit’ and as soon as it sits give the food treat. If your cat stands on its hind legs to reach your hand you’re holding the treat too high. Just skim your hand a couple of centimeters over your cat’s head. If your cat backs up to keep its nose near your hand, do this training in the corner of a room where it can’t back up.