Pets are a responsibility and it is important to take it seriously and own responsibly.
Do you have the time to take care of the pet? Pets need lots of love, some more or less depending on the pet.
Do you have space? Pets need space too!
Will the pet fit in with your family? Don't get a pet if it won't fit in with your family or other pets.
Do you have the money to take care of a pet? Pets need food, toys, water, etc... just like little kids. Make sure you are in a financially secure place that you can guarantee your pet a life with you.