29 Great Backlink Sources To Consider

For the last few weeks I’ve been working on a huge master Excel document with most of the satisfactory to high-value backlink sources I can think of. A checklist if you will. Needless to say the list is extremely long and I’ve gotten a little burnt out now. I’m sure I’ve overlooked some very obvious ones and could really use your help identifying them. In no particular order, here is how I have the link sources categorized right now:

1. Free General Directories
2. Paid General Directories
3. Location Specific Directories
4. Industry Specific Directories
5. Blog Directories
6. Business Profiles
7. Misc. Profile Pages
8. Certifications
9. Associations
10. Donations
11. Sponsorships
12. Testimonials
13. Case Studies
14. Portfolios
15. DoFollow Blog Comments
16. Third-Party Blog
17. Business Partnerships
18. Relevant Link Exchanges
19. Forums
20. Social Bookmarking
21. Third Party Web Stat Tools
22. Article Submissions
23. Press Releases
24. Guest Posting
25. Guest Books
26. Client Websites
27. Banner Ads
28. Classified Ads
29. Employee Profiles

This list doesn’t include getting back links from social media or link-baiting such as high-value blog posts, badges, widgets etc. Just backlinks that are acquired more manually. Link baiting and social media will be on my next list.
I’m sure this list of possible backlink sources is far from perfect, and would appreciate it if you shared some of your ideas here too. Would love to know what I’m forgetting, or haven’t even thought of yet.