As an added advantage, reviews tend to rank well for product searches, so provided you build a popular blog the reviews you write should bring in highly targeted visitors from the search engines. Search visitors hunting for product information are generally buyers, they may not stick around your blog for long, but they will click affiliate links and buy things if shopping is the motivation that originally brought them to your blog.
#1. Wealthy Affiliate - Wealthy Affiliate is my top choice for anyone interested in learning how to create an online business. The training is the best out there and websites and hosting are all included in the program. They also have a free option to join without a credit card so that you can see what is available in the program before you purchase.
If you’re in the “how to make money online” market, you’ll make more in affiliate programs than Google Adsense or most other advertising programs, simply because of the points Yaro mentioned. Affiliate income is also one of my biggest sources of income. I wrote this short article of affiliate blogging tactics: http://www.easywordpress.com/labs/affiliate-product-blogging-model-explained/