If you're serious about making money online, start a blog. Blogging is one of the easiest and most sustainable income sources. As long as the blog is setup the right way, in the right niche, with the right content targeted at the right audience, and the offer is complementary to the content, you could make a tremendous amount of passive income from a blog.
Mechanical Turk is Amazon's take on micro-jobs. These are small miniscule-jobs that you can do for other people, which they call HITs, or Human Intelligence Tasks. These are super simple tasks that anyone can do. Some examples are listing off some URLs with certain kinds of images for one cent, or recording a few phrases with a microphone for 6 cents.
So, now that you know everything there is to know about how to add Amazon affiliate links to WordPress, what will you do with this information? Just save a little money on Amazon? Will you start out small and embed promotional product links into your blog content? Will you be adventurous and launch your own Amazon affiliate store? Or are you concerned about the use of too many affiliate links affecting site speed?
Amazon launched back in 1994 and, two short years later, they developed their Amazon Associates program. In so doing, Amazon was able to increase exposure to their marketplace by enabling web developers and site owners to work as evangelists for their products. It helped drive more traffic to Amazon while giving these business-minded individuals the opportunity to generate more revenue for their own sites and businesses.
Blogging is something that requires patience, persistence and discipline. It may mean writing everyday for over a year before you really start to see any money from it. There are exceptions to the rule, but from my dealings with other bloggers, it seems to be pretty common to spend one or even two years building your blog, your brand and your authority, before making any serious amount of money.