"Trust Rank" algorithm considers many "Off-page" factors for ranking a site. Some easy techniques can be adopted to earn the trust from Google. To rank well through Trust rank put yourself into the site visitors shoe and see how much user friendly is your site.
A few methods to gain a trust rank are as follows. Though a few are costly seeing at the results it gives cost should not be a factor.
1. An old domain name can really be a good option.
2. Buy an SSL certificate that will tell Google that you are a legit business.
4. Include a page for contact details mentioning the telephone, fax number (if needed), email & name.