Please suggest me Name few Black Hat SEO techniques?....
 

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.

Here are top black hat seo techniques
.Spam comment
.Cloaking
.Content hiding
.Article spinning
.Doorway pages
.Link farming
.keyword stuffing

Keyword Stuffing
cloaking
doorway page
hidden text

If you are looking for long term results then I would suggest you to stick to white hat SEO.

Top 5 black hat techniques are:
Limitless Bookmarking and submissions.
Keyword stuffing.
Cloaking techniques.
Hidden contents.
Link farming.

Some of the black hat SEO techniques are :-

Link farming
Cloaking
Hidden contents
Dooraway pages
Keyword stuffing
Meta tag stuffing