What are some good social media promotions?

[Travis]

I finally got talked into starting a Facebook page for my business and was wonderring about some promotions to do. I am fairly new to Facebook and so far have only used it to show some new products, basically a picture and a discription. Any ideas, help or comments are welcome.

1. How can I go about getting more people to "like" my page?

2. What are some good promotions you have seen ran by other business's or your own.

3. Any other ideas?

A little background:
My business is a smaller sporting goods store specializing in Firearms and hunting supplies. My current market is local in an area of less than 25,000 people. My sales are right around $500,000/year and climbing about 10% over the last 4 years so I am expanding and keep looking for ways to expand further.

I greatly appreciate any help.
@kemperk- There are lots of business's on sites such as facebook that offer promotions, etc.

I have clearly defined laws regarding who I may sell to so I'm not worried about that, If someone wants to try to buy from me that is prohibited it would not be allowed.

As far as definition I mainly cater to the hunting crowd but also have alot of self defense type items as well.