I have been Facebook Marketing for Sales for couple years. By using Facebook Fan Pages I have been very successful promoting our websites, specials, videos, and much more. People contact me Worldwide for different machines, and parts. But remember it is a social network so you need to be very social by liking other people posts to grow your presence on Facebook.
Also join Groups that has to be in your field of sales, (i.e. heavy equipment, auto/cars). After joining a group socialize with the other patron by liking their post, and also comment on their post. Make sure you add a link of your company website, if the group/fan moderator let you. By doing all of this you will grow your Fan base or Group Base…REMEMBER SOCIALIZE…IT IS LIKE A COOL CLUB OR BAR…HAVE FUN