Methods to avoid in SEO

[stupid camel]

As a webmaster, there is no excuse such as "don't know".
There are thing that we should avoided in SEO, i was referring to a word "spamming" and i believe, we should not do this.

* creating an automatic "doorway" pages.
* cloaking
* hidden links or hidden text
* pages with irrelevant keywords
* duplicate content on several pages
* misspelling of certain popular keywords or website names
* unrelated link farms

[ENFerrari]

1. Keywords Stuffing
2. Cloaking
3. Doorway Pages
4. Link Farming
5. Page Hijacking
6. Mirror Websites
7. Buying Expired Domains
8. Selling Page Rank

They are all the black hat thing that should be avoided!