In order to demonstrate to your readers that your review is reliable, make sure to conduct as much research as possible before you begin writing. A thorough knowledge of the product, its evolution and its competition will allow you to write something approaching an expert review.  Read the manufacturer's website, as well as any manufacturer information included with the product you are reviewing. Beware of publicity material released by manufacturers and retailers - readers will often stop reading if they sense that publicity material is being used rather than observations drawn from real-life experience. Look into the competition and research the benefits and flaws of products that consumers consider alternatives. This will allow you to compare and contrast the reviewed product with the often numerous alternative products on the market. Buying or renting a product for review is the easiest way to get prepared for a review. However, you may be able to obtain a product directly from the manufacturer or retailer for free if you are persistent.  If you have a blog and wish to post reviews, contact companies through e-mail, a phone call, or even traditional mail. Make sure to be up front about the type of blog you write and the traffic it receives, and keep your message short and to the point. Larger companies may employ a marketing or sales representative. If this is the case, contact the appropriate representative and pitch your review directly to them. Using and getting to know the product you are reviewing are perhaps the most important aspects of writing a product review. Readers will be looking for genuine knowledge of and experience with a product when they read your review.  Fake reviews that are full of exaggerated praise or criticism are widespread on the internet, and most people will stop reading a review if they suspect it is written with ulterior motives. A genuine appraisal of a product is the best way to draw a reader's attention.   Providing a photograph or video of your interaction with the product will demonstrate to your readers that you have actually used it, and will lend credibility to the review. There are several reasons why potential buyers read product reviews, and you should think about these as you research and use the product before writing your review. Common questions readers would like answered include:  Is the product easy to use? Is it of a high quality? Is it geared towards somebody like me? Have others had a good experience with the product? What are the pros and cons of the product? What alternatives are available, and how do they measure up? Is the product worth my money?
Research the product. Obtain the product. Use the product. Know what readers are looking for.