Newsletters

5 Deadly Publishing Mistakes (And How To Avoid Them) - the Publishing Business Group
10 Hot Tips For First-Time Publishers - Success first-time newsletter publishers
25 Ways to use a Customer Newsletter (PDF)
25 Ways to use a Membership Newsletter (PDF) - Keep/attract members
About the Newsletter Industry - Looks at subscription newsletter publishing
Advertising in newsletters and e-zines - Space allocation, charging, and more
ARA - Article Resource Association; free membership, free articles, some relevant 
Consider a Career in Newsletter Journalism - Article 
Editors Only - write better, editorial techniques, Web publishing, design; subscription
Editor's Resource List - Text list of references, news, techniques, associations, etc.
eNewsletters - Internet.com 
Essential Elements of a Newsletter or Magazine Business Plan - From Woodard's book
How to Make a Newsletter or Magazine That Will Last - the Publishing Business Group
How Many New Customers - Assess how many clients are needed to break even
Newsletter Checklist - From the book, A Manager’s Guide to Newsletters 
Newsletter Publishers Association - NPA
The Newsletter Source - Newsletter stuffers: Articles, tips, cartoons, fun stuff, quotes
Newsletter Solutions - Newsletter for newsletter editors; Tips, Steps to Better Editing 
Newsletters About Writing - Writers Corner list
NewslettersOnline - Contains thousands of newsletter articles, some free
Newsletters Only - Newsletter tips, online, names, content, glossary, etc.
Newsletter or newspaper ad? - Impacts of newsletter display ads
Put It in Writing - Tips on Producing a Good Newsletter
Should you have a newsletter? - Quiz - is your newsletter communication medium
Tragic Tales of Newsletters Gone Bad - Discusses common mistakes to make
Web Site of the Week - Newslettersonly
Why newsletters? Why now? - Discusses utility, popularity, necessity

Online Newsletters

How They Are Different - Content exchange 
Content-Exchange - Tips on how to write for the web

Citing Online Sources

Citing Internet Sources - The Editorial Eye
American Psychological Association Style - Web Extension; Tip Sheet  
Citing Electronic Information - Bibliographic formats
Citing Online Sources - Michael Quinion's World Wide Words 
MLA Citation Examples - MLA Style is widely used for identifying research sources
IFLANET Citation Guides for Electronic Documents - Libraries' guide to guides

Resources

Conferences - Upcoming online content conferences and events
Content headlines - Recent headlines from around the Web
Online-Writing list - Discussion list

Books

Content bookstore - Best books for online content professionals
Newsletters - Writing, Editing, Preparation - Eric Deutsch (UCLA Bookstore)
Editing Your Newsletter/How to Produce . . . - Mark Beach:  (UCLA Bookstore)
The Copywriter's Handbook - Step-By-Step Guide to Writing Copy (to Amazon.com)