What to include for letters to local businesses for a directory?


I am doing a letter for a local business directory and I wanted to know what everyone else would ask / include in the letter to get submissions for a yearly fee.

Of course I know the general questions for a directory, but this is my first time trying to promote for local businesses, which I will most likely meet in person after first sending the letter.

Has anyone else done this? By letter or email, same thing really