Viral marketing – competitions are a good way to increase page rank and/or drive traffic.  Creating a campaign need not be expensive nor complicated.  if you want to build a mailing list offer something free to your visitors like a free monthly draw for something of value you provide.  For example of you are a restaurant how about a free meal?  It is a really low cost option and provides a marketing mailing list to promote your business for years to come.

So how about gaining more hits  to your website whilst increasing your page rank.  An example of this can be found at soglos.com by placing this on your website:

An alternative may be to use social media to create a buzz.  For example creating a video testimonial on youtube or adding a photo on facebook.

All the options are simple to implement and low cost.  So engage with your visitors/clients and promote your business virally.