We must focus only on high quality backlinks for our site.

1.Forum
2.Blog Commenting
3.Article Submission
4.Image Submission
5.Directory Submission

Link building techniques vary greatly and their effectiveness the same. This article helps you build links that last and add value to your website

This is the most complete list of link building tactics on the Web, period. I created it because the best tactics are never found in one place, and the most complete lists are completely outdated.
One thing to keep in mind while reading: I did my best to split each one up by category (i.e. Local, Paid, Events etc.), but a lot of them overlap. For example, sponsoring an event could easily fall into paid & events, but I had to pick one. So keep that in mind if you’re looking for i.e. only event tactics.

Forums posting
Article submission
Social Bookmarking
Blog submission.
these are the best tool for link building.

Some of the best strategies for link building -
Forums posting
Article submission
Social Bookmarking
Blog Commenting
Directory Submission

Strategy for link building are Forum participation, Blog Commenting, Article Submission, Press Release and Directory Submission

Strategy for link building are Forum participation, Blog Commenting, Article Submission, Press Release and Directory Submission

Guest Blogging
Forum Posting
Social Media posting
social bookmarking
article submission
Image Submission

Link Building
 

- Forum Posting
- On/Off Page SEO
- Blog Commenting
- Social Bookmarking

these are old ways but i think still works, the new strategy is OutReach Link Building that i have found and this is awesome to gain some organic backlinks in our authority web/blog.

Forum
infographic
blog
Article submission
Press Release
social bookmarking

Here are the six most important factors that will guide your link-building strategy and help you choose the perfect immediate tactics to implement on your website.
Understand Google's quality criteria. ...
Focus on relevance. ...
A diversified link-building strategy is the key.

Backlinks are incoming links to a webpage. When a webpage links to any other page, it's called a backlink. In the past, backlinks were the major metric for the ranking of a webpage. A page with a lot of backlinks tended to rank higher on all major search engines, including Google.

Some important strategies for link building -

Blog Posting
Forums posting
Article submission
Social Bookmarking
Blog Commenting
Directory Submission

Having a good mixture off all the link building suggestions here is key. You can have just one , i however disagree with blog commenting , google killed that a long time ago and is doing the same with social bookmarking. I would practice caution with these techniques they can get your website taken out by a algorithm

Some of the best strategies for link building -
Forums posting
Article submission
Social Bookmarking
Blog Commenting
Directory Submission

bookmarking
classifieds
article submission.
directory
blog

Here are the six most important factors that will guide your link-building strategy and help you choose the perfect immediate tactics to implement on your website.
Understand Google's quality criteria. ...
Focus on relevance. ...
A diversified link-building strategy is the key.

Here are the six most important factors that will guide your link-building strategy and help you choose the perfect immediate tactics to implement on your website.
Understand Google's quality criteria. ...
Focus on relevance. ...
A diversified link-building strategy is the key.