1.Get your pet fixed, but if you adopting they should already be fixed. Cats in heat are the worst.
2. Make sure you get all the vaccinations.
3. When introducing new cat to a new home, dont let the cat just start running everywhere, they will just hide. Introduce your home one room at a time, make sure they dont have ability to run or hide and let them get accustomed to their new surroundings from there.
4. Understand if Cat is an outdoor cat or an indoor cat. If she is an outdoor cat you are going to have issues of her running out of the house, so try your best to train her to stay close to the house. I have a very expensive Cat that was bred to be indoors, so even when she goes outside, she never goes far.
5. Get Cat Food Specifically for Cats that have been fixed (assuming she has been fixed) do not it feed it random cheap market brand cat food. I feed my cat Royal Canine Brand Food only