Document sharing will help to improve keyword ranking and website promotion.In this you can share content related to your website in PDF form,PPT form.
To generate quality backlinks you will have to do effective seo techniques like Blog posting,Article submission,Forum posting.Never use duplicate content.
I will prefer following effective seo techniques:
Blog posting
Forum posting
Article submission
Apart from this social media is the best way to get website promotion and website traffic.
Nice post.Meta description should be of 150 characters and it should contain target keywords.Description should be attractive one so that people can easily understand about your page.
My suggestion to you is that change one site because as you are saying that you have made two same sites then their content is also same.Google will not accept duplicate content.
To get high rank in Google search engine you need to generate quality backlinks by submitting unique content on high pr sites and you can also use social media sites to get instant traffic.
Google local business listing is the method to promote your business on local basis.With this technique you can easily promote your business locally and easily get target customers.
Backlinks are very important to get high rank in Google search engine.Low quality backlinks low rank of your website on the other hand quality backlinks will promote your business and keyword ranking.