1. Write articles and submit them to article directories that have a high page rank. You can Google search to find various lists of these type of directories.
There are many article directories that get a lot of traffic and have a
high page rank. These are the type of backlinks you want because it will help improve your own page rank and potentially get more traffic as well.
2. Subscribe to Google Alerts for blogs relating to the theme of your business. Post comments on the various blogs you see When these alerts come.
Google loves blogs and these can all become great backlinks for your business. Doing it this way helps you make sure the link you are getting is related to the topic of your own website.
3. Post comments in relevant discussion forums. Forums that get the most traffic are the ones that are going to be spidered the most by Google and other search engines.