You can get high quality backlinks if you link only to those that are relevant to your site's niche.

Do Forum posting, Guest Blogging, content post and social bookmarking

Make backlinks from high PR site use unique content will making links target the specific keyword related to your niche. Update your website content time to time, So that the search engine bot crawls your website, It will sure helpful.

You can use the White hat Seo Off page steps.

You must go through Offpage seo technique such as Socail Bookmarking, Article submission, Press release, Blog posting.

Link building can be tough especially if the same process that you used to get links for a website yield the same undesired results.
A high-quality backlink must have few qualities such as:
Use of unique & informative content.
Proper use of keyword in your content.
Must be posted in High PR website.
These are few techniques for generating quality backlinks-
QnA.
Forum posting.
Blog posting.
Article submission.
Social bookmarking.
RSS feed.
Web 2.0 submission.

Can you suggest me which types of off page techniques according to your end..?