Most cats will respond to food rewards, which are a type of positive reinforcement. If you use soft moist cat food or dry food as a treat, you will lessen the chance of disturbing a properly balanced diet. If your cat has performed a certain task you have asked of her, make sure you not only reward her with a food treat but with verbal praise as well. You will have more success if you work with one command at a time. As with any kind of training you have to be consistent and let your cat work at her own speed. When you see even the slightest glimmer that your cat understands the behaviour you are trying to teach, reward her enthusiastically.