Get the best WordPress review themes here: http://scriptech.net/templates-themes-collection-review/wordpress-review-themes-plugins/
Read more about how to write a product review here: http://scriptech.net/online-business-tools-scripts-collection/affiliate-programs-scripts-collection/how-to-write-reviews
Writing reviews about products is one of the most effective way for affiliate marketing. Giving good quality information on products, tips to use it and by using some tricks we can make review articles which convert really well.
If you follow the mentioned product review writing tips you will be able to write much better reviews, no matter what sort of products or services you want to promote.
If you want to build review websites, I suggest you to check the WordPress review themes mentioned above as they can help you to build even better product review websites.
For more article writing tips and tools check out this playlist: http://www.youtube.com/playlist?list=PLqPWGuvoqpM3rwNBuGvbu0j_K_hA7h_qA