Your search for a cosmetic dentist can begin with you asking for recommendations from friends and family. Find people who have had done the work you need, and ask how satisfied they were with their dentist. Keep in mind the names of both those that were liked and those that weren't, as both can be useful for you when making a general list. It is best to look for cosmetic dentists who are certified by the Academy of Cosmetic Dentists.
Remember that a cosmetic dentist is very different from a regular dentist. A cosmetic dentist specializes in improving specifically the appearance of a person's teeth. They must have a good eye for symmetry, and be able to apply veneers, bridges, and crowns.
Once you have a list of names, you should always interview the candidates. Find out what their credentials are, where they received their education, and how much experience they have. Ask for before and after photos (their portfolio) to make sure their actual work is as good as they say. Don't be afraid to request references and testimonials, as those will provide you with feedback from other customers.
Ask your cosmetic dentist candidates for the pricing. If they can not answer you directly, you might want to move on. You should be aware of how much the procedure will cost, and whether there could be additional fees not mentioned in the beginning. Ask the dentist what the possible side effects could be, and how much those could cost you. Don't forget to find out if the dentist you are interviewing takes your insurance plan.
There are a few things you should expect from a good cosmetic dentist. They should do a full and thorough check of your dental / medical history, and they should advise you to have a head and neck examination done. Your cosmetic dentist should also advise you to have an X-ray done. Make sure your dentist wears a mask and gloves as they are performing the procedure, and that they are willing to inform you of all the ways they keep the space sanitary and you protected.