What are some black hat SEO practices to avoid?

[WoodsPainting]

What are some black hat SEO practices to avoid?

[mariajonas]

Not "some" but we should avoid black hat techniques as a whole

[sulbha]

Hi Friend,
Black hat SEO tactics to avoid

Keyword Stuffing.
Invisible/Hidden Text.
Link Buying or Exchange.
Social Networking Spam.
Cloaking.
Article Spinning.
Doorway/Gateway Pages.
Unrelated Keywords.

[makoo]

Hello, while doing SEO you need to avoid the following black hat SEO practices:[1]

Keyword stuffing
cloaking
Using private link networks
Tiny text or hidden text
Duplicate content
Blog spam and comment spam
Unrelated keywords
Page hijacking

[stallonemanor]

Black hat SEO techniques are

Doorway pages
Keyword stuffing
Link farming
Hidden link
Link Schemes
Article Spinning
Duplicate content

[kyotobaths]

Black hat SEO techniques are

Hidden link
Keyword stuffing
Hidden link
Short URL
Duplicate url