Whenever we see a blog post catch on in search for one of the blogs we manage, we celebrate, because it will probably send lots of traffic to the site over time. Unless you have a massive email list or rely entirely on Facebook shares like BuzzFeed-type sites, you should aim to get a good portion of your traffic from search. (Though a massive email list and lots of Facebook shares are pretty great too, and will help your site catch on in search… so all of these traffic-generating activities feed into one another.)
If you have a background in a specific field, you may find there is a demand for writing industry papers in your area of expertise. For example, there are often adverts for doctors, lawyers, nutritionists, and business experts from particular niches, to write white papers on different subject areas. These are well paid jobs that you will need to stake your reputation on, but that can often be worked on from the comfort of your own home.
Be sure to check what kind of customer support you can expect from your affiliate program once you have signed up. Do your research online and if possible, speak to other sellers using the program to get their thoughts. Can you speak to someone via phone or Skype or do you have to wait 72 hours for email responses? Be clear on this because trust me, you will need support at one point or another.