There are some good sites out there that will pay you to write reviews on your blog for various products and services. I haven’t done much of this, but I’m hoping to eventually incorporate it into my niche sites. Some of them are picky about what blogs they accept/approve, so you may have to wait until your blog is older and more established.
Some of the best sites are:
Social Spark
This blog is to help anyone make money online.
ConversionConversion EmoticonEmoticon