Social bookmarking is a method for Internet users to store, organize, search, and manage bookmarks of web pages on the Internet with the help of metadata, typically in the form of tags that collectively and/or collaboratively become a folksonomy. Folksonomy is also called social tagging, "the process by which many users add metadata in the form of keywords to shared content" read more...
Helpful Tools - Social Bookmarking Automation Services: It's a little quirky when you first start use it, but does help speed up your social bookmarking once you get the hang of it.
OnlyWire - semi-automates to over 30 sites; friendly user interface; great for newbies
Social Bookmarking Sites: F - Follow, NF - No Follow
1. Digg.com F
2. StumbleUpon.com NF
3. Reddit.com NF
4. Delicious.com NF
5. Mixx.com F
6. Propeller.com F
7. Newsvine.com NF
8. Fark.com
9. BlinkList.com NF
10. Buzz.Yahoo.com
11. Technorati.com NF
12. Kaboodle.com
13. SlashDot.org F
14. Twine.com
15. ClipMarks.com
16. DZone.com
17. Faves.com NF
18. Simpy.com
19. BlogMarks.com F
20. Squidoo.com F
21. Mister-Wong.com F
22. FolkD.com NF
23. Netvouz.com NF
24. Sphinn.com NF
25. ShoutWire.com F
26. Diigo.com NF
And more, no follow...
Connotea.org NF
WireFan.com NF
Swik.net NF
ThisNext.com NF
Megite.com NF
IndianPad.com NF
Symbaloo.com NF
De.lirio.us NF
LinkRoll.com NF
and follow...
Yahoo Bookmarks F
BookmarkTracker.com F
Linkagogo.com F
BuddyMarks.com F
GiveALink.org F
MyLinkVault.com F
Corank.com F
Igooi.com F
Searchles.com F
Spotback.com F
Oyax.com F
Bmaccess.net F
Mypip.com F
Tagza.com F
Bookmarks.com F
JumpTags.com F
Bibsonomy.org F
Spurl.net F
Ez4U.net F
A1-Webmarks.com F
Yattle.com F
Plugim.com F
Tedigo.net F
Ka-Boom-It.com F
Citeulike.org
DesignFloat.com
and more - List of 97 SBS