Yeah..You can improve your traffic using the SEO techniques..You can increase by following this techniques,
1.blogging,
2.Forum posting,
3.Directory submission,
4.Article Submission ,
5.social bookmarking..
These are some seo techniques which helps to increase traffic..It's a long term process.So, you can increase the visitors in a short time by getting the SEO package at
http://www.tucktail.com/ which helps to increase your traffic ,PR easily.