1.      Ask yourself various questions about different kinds of pets: Aquatic Pets  
• How much space will you provide to your fish? Do you have a plug near your free space? (for an aquarium).
• Do you have enough time? This means more than feeding. Do you have the time to commit to regular aquarium cleaning. washing the entire structure and then gently putting the fish back.?
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• Avian Pets
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  • Do you have enough space? The larger the bird the larger the cage it needs.
  • large parrots, have long life spans. African Grey parrots, for example, live an average of 50 years. Budgies, on the other hand, live 5-15 years. Don't choose a bird that you're not willing to make a lifetime commitment to.
  • Do you have time to spend with them? Cages need to be cleaned regularly depending on the species. They need at least a time daily of interaction with a human. A lone bird can get bored easily and can develop bad habits of over-grooming and over-eating which can be life-threatening. Toys and appropriate avian companions can help mitigate this issue, but they still require interaction with the family, they may not get along with their bird companions and it would also affect overall costs, space, etc.
• Many avian pets are prey species. As such, they have evolved to not show signs of illness until they're almost dead. You need to have a keen sense of observation to be able to get your bird medical attention promptly?
• Remember some avian pets are a life time commitment.
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  Lizards/Snake
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  • Will you be prepared for a long living pet?
  • Will you be willing to feed it crickets and mice?
  • Do you have enough space? Snakes and some lizards can grow to very large sizes depending on the breed. Are you prepared for increasing space requirements?
  • Who will look after it when you go away? Choose the most appropriate type of snake and lizard suiting your maintenance level and environment.
  • Dogs/Cats
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      Are you allowed dogs/cats where you are living?Are you prepared to walk a dog to provide sufficient exercise?
    • Having an unruly animal can play havoc with your life. Even if you decide not to attend a formal obedience program, you should be prepared to doing some reading and apply necessary discipline for basic training.
    • How much attention can you devote? Most dogs have to be walked every day and have to go outside to relieve themselves.
    • Who will look after it when you go away for a while? Check for the availability of pet sitters in your area, if you do not have friends or family who are willing to care for your pet when you are away.
    • Do you move around a lot? Dogs particularly may not respond well to frequent changes in their immediate habitat.
    • Are you getting an adult pet or a young pup/kitten?
    • Dogs and Cats can live up to an average of 15 years, depending on breed. Will you be up to that much commitment?
    • Can you afford
    • yearly vet bills and unexpected vet bills? You may wish to consider Pet Insurance.