I run a web site called Backcountry Secrets (http://www.backcountrysecrets.com). The idea of the site is to get people to share points of places to hike, bike, canoe, swim, etc.  
  
The problem I am running into is that everyone who visits the site only consumes, no one shares.  
  
I have considered doing competitions for prizes. For example person with the most submitted points over a specified time wins something.  
  
I've also considered doing something like, "Next 20 people to submit 50 points gets a $25 Applebee's gift card." 
  
Do you have any suggestions for me as to a campaign that may also help?  Also, if I do the competition for prizes, what types of prizes (under $100) would you be interested in?