Product Reviews are really helpful for buyers to make a wise decision regarding buying a particular brand of product or not. The best way you can write a review for a product is by using it. While preparing a product review, you can include product features, usability etc. to make the review more informative and useful.
Make sure that you are providing useful information only. After you write a draft, critically read it and weed out anything you think that may found useless information by the buyer. When you write a review you have a big responsibility on your shoulder to provide an unbiased opinion about the product.
Your reviews should be based on the actual facts and figures. For e.g., if you are writing a review about a camera, the first thing you can include is some technical specifications as provided in the product catalogue. Include some comparison information with other similar products. The actual experience while using this product should remain the main focus of the review, since readers will be more interested in this information.
You can also use these product reviews to earn some money. If you have an affiliate account, you can use your reviews to actually promote and sell a product online and earn commission out of it.