I personally prefer to do it that way--you can create a more convincing review that's more likely to make sales. It's not always possible or practical, though; for example, would you break up with your significant other just to test a product for getting your ex back? ;-) In cases like that, or if the product is expensive, it's usually best just to use the vendor's affiliate resources instead.
I've tried affiliate marketing in the past without a lot of success, so wasn't sure that this book would help me much with giving it another shot. However, I was pleasantly surprised. There's no fluff or filler in this book - it's obviously written by someone who knows what they're talking about and it covers (in detail) what it promised - how to get started (and be successful) in affiliate marketing. I especially appreciate that the author added sections that aren't typically covered in these kinds of books, like how to use videos and bookmarking in your efforts as well as how to deal with backlinking after Google's Penguin and Panda updates. Glad I picked this one up. It's a keeper.
Be patient. Finally, affiliate marketing rarely leads to overnight success. Instead, it usually requires a lot of time and effort to slowly generate traffic and build an audience. This is especially true if you’re starting with a new or low-traffic site. It’s essential that you don’t expect quick results, and are ready to put in the work needed to grow your site and commissions.
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.