Avoid doing black hat SEO unless you want your website to disappear overnight on Google search.

TOP 5 BLACK HAT SEO TECHNIQUES,1)Hidden Content. Top of our list of black hat SEO techniques is hidden content. ...2)Meta Keyword Stuffing. There are two Meta tags that are generally used to inform search engines of the content on the page. ...3)Meta Keywords. ...4)Doorway or Gateway Pages. ...5)Link Farming.

It's not follow the google guidelines.

Black Hat SEO does not follow the Guide line of search engine.

Doorway pages
Keyword Stuffing
Link Farming
Hidden text
Copied Links

Blach head SEO means not following the guidelines of search engine. it can be done through
Keyword Stuffing
Doorway pages
Duplicate content
Cloaking
Paid Links

I am not using any black hat techniques as if affects the results permanantly

Black hat is not good now since searches get familiar. Here are what you are in need,
Hidden Text or Links
Keyword Stuffing
Reporting a Competitor
Sneaky Redirects
Cloaking

Google wont follow Black hat SEO.

Black Hat SEO does not follow the guide Line of search engine.

Cloaking
Doorway Pages
Keyword Stuffing
Hidden Text
Link Schemes
Article spinning

Some popular black head technique is
Keyword stuffing
Duplicate content
Doorway pages
cloaking
Hidden Keywords
Paid links