Is it 3 techniques enough to get back links ?

Yes !

I have tried only these 3 back links.

• ·        Article submission
• ·        Social bookmarking submission
• ·        Local directories

Why we are doing only few back link techniques ?

• ·        Because over optimization may result in getting penalty from search engine.
• ·        Even low quality back link helped to get organic ranking before introducing the Penguin algorithm
• ·        These few back link techniques as proven and this screen shot is proof.

  

  Back link report in tool