What is your opinion on proper link building?

Link building is total off page techniques. With of page techniques you can create your backlinks. According to my opinion you have to  do some following techniques.
a) social bookmarking
b) business listing
c) web 2.0

Hi Friend,
Proper Link Building means create a backlink with quality content on High page authority relevant websites.

• Social Bookmarking
• 
  Local Business Listing
• 
  Directory Submission
• 
  Blog Submission and Commenting
• 
  Forum Posting and Commenting
• 
  PDF/PPT/Infographic Submission
• 
  Audio and Video Sharing
• 
  Press Release Submission