Great advice here. The typical idea of writing reviews of bicycle pedals and expecting someone to follow your link in order to buy a pair is dead. Now if you are actually a cyclists, and you know something about all the different types of pedals, and why different types solve different cycling problems, then hey, welcome to the world of providing useful content.
URL masking: Often, you’ll find that affiliate links are a real, million character eyesore. It’s likely that your links will look like Merchant.com/dlfjlfjlfjdskljdfgimmeallyourmoneyalajdlkaf2131032klfjfdjldsjf. And let’s be honest, few people are going to want to click on that. URL masking is therefore when you create a prettier, cleaner “vanity URL” that makes your links more clickable. Some people use bit.ly, which has tracking purposes, or the WordPress Plugin Pretty Link.
You should also make sure you aren't competing with your own affiliates for eyeballs. Any marketing channels you're using, such as search engines, content sites or e-mail lists, should be off limits to your affiliates. Put marketing restrictions into your affiliate agreement and notify partners immediately. It's your program--you set the rules. Or, if you prefer, you can let your affiliates run the majority of your internet marketing.