Chris Silver Smith of SuperPages.com  has given some extreme local SEO methods which one can use for SEO of local business. Here are a few tips:

Your business should have some top keywords which are used by the users in the search engines when looking for business of your kind. Business can have informal names with keywords which would help new customers find them easily. Name your business having first alphabets as some local search engines show search results in alphabetical order. This means that persons who uses letter 'A'  to start their business names may get more prominence in search results than businesses names starting with lower letters.

Have your business near to the center of the city as some local search engines show local results according to the center point of the city area. If the business address is near to center point than local search engines may rank you higher in the results. Change your street address that have keywords relating to your business. If you are a big businessmen or has heavy political clout than you can have the street address changed that have keywords of your business and can be beneficial to you.