There are several things to try before choosing a cat:
1. Consult an experienced breeder to find out which one could be the perfect cat for you and your family.
2. Spend time in a good pet shop. Don't rush into choosing an animal at the first shop you end up in. The place has to be perfectly clean, and its staff should be able to give you the right advice for your choice.
3. Neighbors and friends might be a good source when you are looking for a cat. But in this case you have to visit a veterinarian as soon as possible, to make sure the cat is healthy.