Coinurl is a url shortening service which pays users in bitcoins for each time a user clicks on a shortened link.
All you need to do, is create a short url and then link to that from your facebook page, twitter, reddit, your blogs or any other place you can imagine. You are paid for each unique visitor who goes through those links.. so once you have setup your links you can forget about them.. and earn bitcoin for years and years.. all without doing any extra work.
CoinURL also offers banner ads and pay per click ads if you have your own blog or website. These can pay very good rewards per click, although you will need to have a cryptocurrency related website to be approved to publish ads. If you don't have your own site you could use a free blog host such as tumblr.com or blogger.com - These both allow you to place CoinURLs banner ads on them.