Basic Word Perfect Commands - very comprehensive.  A great online reference page.

Corel Corp.'s Statement re 5.1 and Y2K issues (5.1 DOS is “compliant with minor issues [which] should not affect the overall performance of the product."

Corel Corp.'s Support Page for 5.1  - a searchable Knowledge Base, phone and fax numbers for help and some great links

Mitzi Ponce's Practical Macros for 5.1 - great macros including one to prevent you from exiting without saving your work.

Macros and Tips for all Versions

Installation & Set-up Tips for 5.1 from Massachusetts tort and copyright lawyer, Ronald Sandler

WordPerfect Wiz - Helpful Links for versions 5.x to 7.0

The Legal WordPerfect Page - web site of  attorney, author,  and macro programmer" Richard C. Belthoff, Jr.

Word Perfect Universe - site of Gordon McComb - author and macro expert. 

Advanced Tips & Tricks - for students at the Northeastern University's College of Medicine.