Name some of the few black hat techniques that one should avoid?

[jay_11]

Name some of the few black hat techniques that one should avoid?

[bhavesh_11]

Link farming, doorway pages, cloaking, keyword stuffing and hidden text

[gauravkap329]

Some of the Blackhat techniques you should avoid are :-
1. Content Duplication
2. Keyword stuffing
3. Cloaking
4. Link Farming

[yuva12]

Duplicate Content
Article Spinning
Cloaking

[jayam]

Content Automation.
Doorway Pages.
Hidden Text or Links.
Keyword Stuffing.
Reporting a Competitor (or Negative SEO)
Sneaky Redirects.
Cloaking.
Link Schemes.

[ipmedia]

Paid Backlinks is one of the top Black Hat SEO Technique

[dombowkett]

You should avoid duplicate content posting as well as spam backlinks building.

[amarathomas]

1. Content Automation.
2. Doorway Pages.
3. Hidden Text or Links.
4. Keyword Stuffing.
5. Reporting a Competitor

[RobertHadirson]

Content Automation.
Doorway Pages.
Hidden Text or Links.
Keyword Stuffing.
Reporting a Competitor (or Negative SEO)
Sneaky Redirects.
Cloaking.
Link Schemes.