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.
I eventually learned the best model (for me) was to copy what Yoast did… charge a flat free for SEO Audits. People were always super happy with my audits. I still have my SEO audit templates (one for local SEO, national SEO, etc). Sometimes it would only take me 4 hours to write an audit and I would get $750, sometimes more if they wanted a more thorough audit. Maybe I undercharged?
Can you make money with affiliate marketing? The short answer is yes, affiliate programs can earn extra money and even a full-time income from home. The long answer is a little more complicated. Like any home income venture, success comes not so much from what you choose to do to make money, but whether or not you do what needs to be done correctly and consistently.