There’s many way, you can do reach organic site traffic at no cost except your time:

1- Optimize for your personas, not search engines.

2- Blog away.

3- Plug into the biosphere.

4- Use long tail keywords.

5- Get your meta down.

6- Consistently create quality content.

7- Use internal links.

8- Encourage incoming links.

9- Blow your own trumpet.

10- Use social media.

11- Exploit metrics.

Build links for long-tail keywords and you will see results in 6-12 months.

Keep doing Off page techniques till your keyword comes to the first position of Google

Both on page and off activities are required to get organic results. You have to expose maximum keywords related to your business to search engines.

Do on page & off page optimization, will get Organic Traffic.

On page Activity
Create the Sitemap.xml
Create Robot.txt
Use Proper H1, H6 Tags
Alt Tag Images

Off page Activity

Content Marketing
Blog Creation
Yahoo Answering
Social Bookmarking submission
Directory submission

Try to rank the your keywords on Google's top results for maximum keywords to get the higher organic traffic with the use of various off-page SEO techniques.

These Eight steps are the best way to increase the Organic Traffic
 

These Eight steps are the best way to increase the Organic Traffic

• Perform Keyword Research
• Optimize your website
• Use long tail keywords
• Blog often
• Create Quality Content
• Get social
• Partake in ethical link building
• Play by the rules

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I think on page and off page both are important in SEO do quality work than increase traffic.

Very Good Article. d