Facebook is proving to be the best competition platform I have used in years. Entry is easy as is picking a winner and letting everyone know who won.
It is especially useful for attracting new shoppers. I know of plenty of new shoppers now visiting as a result of a competition I ran of Facebook.
The key is to not be overt about the competition.
Write about a cool new product you have in store and at the end of the post say we will give two away to anyone who tags a friend in a comment to this post.
In one case recently I attracted over 500 comments / entries for a $10 spend via a boosted highly targeted post. A secondary benefit was many additional likes of the business page.
While competitions in-store have their place, out of store competitions run in a style appropriate o the target consumer is the best way to attach your business to lovers of the brand or product.
It is vital we market our businesses outside our four walls as new traffic is mission critical to us with several key traditional newsagency product categories flat or in decline.