Use your site to advertise your own products by posting ads for them along with any other ads you have running. This can help you get more sales for your products. Of course, you might want to write articles that feature your products and services once in a while and that's natural. By having sidebar advertising for them, however, you are able to sell your product every time someone visits your blog whether or not you've chosen to highlight something that day. This will also attract more advertisers because they will believe someone has paid for that space so it must be worth purchasing.
You can also monetize the RSS feed of your blog. You must have an RSS feed for your blog so if you haven't set it up you should do it now. The majority of people take advantage of RSS readers to see what new articles are being posted on blogs nowadays because of convenience and excellent portability across numerous devices. Some of the larger advertising agencies have RSS monetization and have been providing this option for quite a while.