If you are a keen and loving social person then you can use your friend circles to earn some bucks. Try to increase number of your Google+ followers as much as you can and once you have surpassed the 500-1000 limit then you can sale out +1'd recommendations to web owners. Rankings widely depend on social networks and web owners can spend enough money to buy tweets, Facebook likes and Google+ recommendations to rank their content higher.
PS: You can find people selling 100 +1'ds at $200! Google it for yourselves.