Freelancer – refer people to developers, designers, and other freelancers you’ve worked with and make 100% of Freelancer’s project commission for the first 90 days. I get a lot of people requesting WordPress speed optimization services… so I refer them to my developers with a freelancer affiliate link and make $125/month in passive income. You can’t use affiliate links to link to specific freelancer profiles, so I direct people to the homepage via affiliate link and give people my developer’s usernames.
Amazon’s affiliate program is the most popular of them all. I don’t participate myself (yet) but the majority of affiliate marketers I know use Amazon because… it’s Amazon. You can review products you have used or write tutorials (eg. how to connect computer to TV) and drop an affiliate link to an HDMI cable… just a couple examples. You may want to build relationships with the manufacturers so you can get products before they’re released – giving you time to create a review before the product is launched and capture sales during peak buying times.
Thirsty Affiliates tracks, cloaks, and categorizes your affiliate links. Once you’ve signed up for your program(s) grab your affiliate links and add them to this plugin. This can take time if you will be linking to multiple pages on your affiliate’s website (which in many cases, you should). The pro version comes with statistics but I don’t even use it and I’m quite the analytical person.
While your site is still new, it's a good idea to start capitalizing on someone else's audience. Continue focusing on building your own content, but also considering writing content for a few big, high-traffic blogs that are relevant for your niche. By writing content for a bigger site, you are able to get in front of another audience and showcase your expertise on a particular topic. This will eventually lead to more traffic to your site, as well.
What struck me about Dr. Rose’s experience was how affiliate marketing attracts everyone — from those with no degrees (but with strong work ethics), to those who are fully degreed (and pedigreed), but who want to do their own thing. Dr. Rose stated in that post that her mission was to earn what she earned as a pharmacist in a year — in one month in affilite marketing/blogging.