My Top 10 Picks for Human Resources

1. Society for Human Resource Management(SHRM) - The premier association for HR pros.  It's mission is to ensure that HR is recognized as an essential partner in developing and executing organizational strategy.  If you can get actively involved, you'll greatly benefit.  If you can't, just keeping up with the info on the website will help.  (Membership is required for most of its knowledge base.  There is an online membership only option.)
   
2. Human Resource Management Resources on the Internet -- This extensive, annotated, constantly-updated list is published by Nottingham Business School(UK). Formerly maintained for them by Ray Lye, it is now managed by David Bott.
3. Workforce Online -- The online version of Workforce Management Magazine.  Cutting-edge info on HR issues. You can't get any better than the best.
4. Workindex.com -- Published by HR Executive Magazine. 5000+ links to HR related sites. 3 Sub-sites: Staffing, Benefits and Training.  Link index provided by Cornell University's School of Industrial and Labor Relations.
5. HR-Software.net -- Comprehensive link directories to HR relevant software sites.
6. HRTools.com  -- Produced by KnowledgePoint, a leading publisher of desktop and enterprise-wide HR software.  Provides online HR applications so extensive that it is a virtual HR department in and of itself.
7. Alexander Hamilton Institute -- Provides wide coverage of HR law and legal resources.
8. The Training Supersite -- A production of Training Magazine, this site provides the most current information and a wide variety of resources and links in the field of training.  And who needs training resources more than the HR department?
9. American Society for Training and Development - The premier professional association and foremost resource on workplace learning and performance issues.
10. International Society for Performance Improvement - Dedicated to improving human and organizational performance. Offers publications on Human Performance Technology.
    

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Not really HR dedicated, and not in the top 10, but useful and well-regarded:
    11. The Riley Guide  -- An online guide for job seekers that HR can use to help employees who are leaving (voluntarily or not) to find their next employment.  Since 1994, this resource site has been growing and refining its offerings to help employees and career builders.