– Create quality content in your site. Or create a blog for your site and offer 3 way link.
– Make a lot of content on your site and cross link all your internal pages to each other and specially put links to your main page from all your pages.
– Create incoming links…as many as possible
– Purchase links from websites that have higher PR than you
– If you cannot do #3 because you dont have money, then you need thousands of links to get to PR6 or 7….think of offering something usefull or free that will make people naturally link to you…think of offering some kind of service or tool to webmasters that can link back to you…for example if your site sells t-shirts, then offer a free t-shirt to anyone that links to you from a PR5 or above site. Another idea is to run a contest and offer a service or product to a random winner that links to your wesbite. more relevant back links.
Quality content and quality links for the site.
Improve your link popularity for the site.
Add article page and so the user will visit your site.