You should brush him at least once a week to get stuff our of his hair. Make sure he gets good exercise either by playing ball with him or taking him for a walk. Make sure if you go for a walk that he is on a leash. If you have a cat Be sure there is clean food and water for you cat. If your cat is always in the house make sure it's litter box is always kept clean.
Cats like to play with toys so have a few for it to play with.
If you have a hamster, guinea pig or other small caged animals Make sure they always have fresh water and food. Keep the cages very clean. They like toys too, maybe a spinning wheel would be fun for them. If you have a farm pet like maybe ducks Be sure they have a small pond to swim in. When you feed them do not feed bread or human food.