there is 1 way : Build a good content!

Hi,

Try to buy links from relevant websites. may be you can use linkadage.com. Try to find website with good PR and an old website, especially not banned in google and other SEs

An effective linking strategy will extend your market reach.List and rank your top six target sectors. Identify ezines, newsletters, blogs and directories that serve each sector. Craft a basic linking message for each sector and use these messages to create customized link requests.
Google PageRank is only approximate, so never base a linking decision on a site's PageRank score. Instead, look closely at the quality of content and audience that a site has. Low PageRank sites can be reasonably easy to get a link from and it can pay dividends. For example, I created a link for a client on a small site which had, by chance, sparked a journalist's interest. She wrote a story that in turn was picked up by the BBC, resulting in a feature on their high-traffic news site.

well you can always submit it to directory, write articles, and buy links....

buying links might be...

I will suggest you not to buy links but try to get them naturally, i mean get then through blogging, forum posting, article submission with url of your site as signature.. this will give you backlink and thus will improve your ranking.
Do all SEO optimise your site ONPAGE and OFFPAGE.
Try to get higher rank for all searchengines, once you are at top you will definetly get higher traffic.
But remember great traffic does not mean sales, so try to get targeted traffic which has good conversion ratio.
Thats all .....

Have you tried submitting your sit to all the major search engines, submitting articles to various places about your site, submitting your link to directories, and exchanging links with other people?

Try to get backlink from other website e.g. submit your site to search engines and web directories.

As most people have mentioned there is no quick fix, link building is one of the most time consuming and important parts of any SEO campaign. The best way to build links is article writing which gives you lots of links but also relevant links which are more valuable.

Stay away from linkfarms!