Black Hat SEO tactics you should avoid

Here are 23 SEO tactics which are branded as unethical or Black Hat SEO tactics and should be avoided. Use of these Black Hat SEO tactics could lead to permanent black listing of your website from Google searches.
1. Similar colored text and background.
2. Use of Title Tag as a place to list keywords.
3. Text hidden in an image.
4. Reciprocal Linking.
5. Creating lots of Google Places pages that all list the same physical address.
6. Try to get the search engines to index all of the search result pages on your site.
7. Use the Meta Keywords tag.
8. Linking from a hyphen, period, comma,etc.
9. Filling your Meta Description with keywords.
10. Linking/keyword stuffing in small text.
11. Text hidden with CSS.
12. Name your images with the character limit in keywords.
13. Keep track of your keyword density.
14. Blindly target your competitor's keywords.
15. Subscribing to link farms.
16. Link Wheel
17. Provide different keyword rich business names to local sites.
18. Three Way Linking.
19. Spamming in discussion forums and blog comments.
20. Submitting your website to thousands of link directories.
21. Link Exchange (unless it is a real business relationship)
22. Just depend on Google Page rank to determine your website's success.
23. Use robots.txt to control robot access.