Here is the freebie of ezine advertising. Having your article published in an ezine is currently the easiest and the most productive form of free advertising on the Net. In my experience, an article being run for me will usually pull around the same as a sponsorship ad or just slightly less than the sponsor ad. The advantage to it is that it won't cost you a penny. What you do need to know is how to submit your articles for the publications.
Most people do it completely wrong.
Use the ezine publisher's name in the subject of the email if you want it to be read. You will be competing with dozens of other daily submissions, so your article will have to stand out. Watch the news and scan the online news sites that pertain to your business to stay on the cutting edge of what is happening in the world today. Then, when you write and submit your article it can be on something that is current and newsworthy. The publisher is then much more likely to use it and run it because it is exactly what they are looking for.