Provide proof of good health. Maintain current inoculations for distemper, hepatitis, leptospirosis, para-influenza and parvo virus and rabies. Obtain a stool check for parasites at least once every year. Keep current a health certificate attesting to these inoculations as well as the general health and condition of your dog. Good grooming is important for both you and the dog.
Appearances are very important.
Many times people will only see you and the dog, and not have the opportunity to interact. You will not, therefore, easily dispel a bad first impression. The impressions people have of you and your dog reflect upon all other service dogs. The most natural of doggy and human scents can leave an impression of lack of care. Both of you should be clean and odor free.