Writing a good piece of unique quality content will rank better in the search engines and it will also encourage people to like it, share it etc. People will not do that with your content if they see it as poor quality. Let’s be honest here, if you were reading something that you thought was pure garbage, would you read and share it? Of course you wouldn’t and neither would I.
Monster-Traffic is another traffic exchange, though it’s initially a little off-putting due to the 1995-style website. It’s a free for all styled advertising list, where anyone signing up becomes part of the audience and an advertiser at the same time. You sign up and you can enter a link into their system, and that link is added to a roster that is send out to every member of the group. Additionally, registration allows a free solo ad; an ad that isn’t drowned out by other advertisers in that mailer.