At this moment, news tells that facebook gets more traffic than google. Whether this is true or not it is good to have your own custom fan page. They say that traditional marketing is dead. I believe it is still working for some other people. But creating own fan page would definitely generate leads increase sales.
Read these guide on setting up / creating facebook fan page . Patience and persistence are two of the keys. The are free fan page template and there are custom built. But to remind you, your business is unique. So it is better to have a unique and custom fan page. Keep in mind your target customer. Are your products/services intended for local customers? Be carefull on requesting fan page likes, if you are reported of abusing the terms and conditions and spamming, your account can be permanently banned. There are some tips and tricks on how to request fans and increase fan page likes. It will be posted in some other time for I don't have a time to write it yet.
Avoid spamming, keep your articles unique and original, be honest with your products and deliver your goods and services. There is no better sales pitch that a friend's recommendation. So, good luck in creating your new fan page.
