Offer your website visitors a service. When a service is offered, this gives a reason for people to want to do more on your website than just read it.
Consider offering a free subscription to a e-zine that you create, use SFI banners to post in your blog postings, and consider having others to write worth while articles that are on topics that are current.
Traffic means that people want something - searching for a solution thus use your website to promote a service through SFI.