This page is a work in progress. Please help by suggesting more resources and reading material.
The idea is to assemble a list of freely available knowledge on visual observing, techniques and products available on the Internet. If you know of any interesting or valuable resources we should include here email Mike Simonsen  with links, urls, book titles, etc.
(remember to order them from Amazon.com through our website . 5% of the purchase price will be donated to AAVSO!)
There are many other books with reviews in the AAVSO Variable Star Bookstore  that may not specifically relate to visual observing, but are about variable star related subjects.
The Webb Deep-Sky Society Handbook, Volume 8, Variable Stars by John E. Isles
It's available from http://www.webbdeepsky.com/observe.html 
and has a very good section titled 'Sources Of Error' (Not to be skipped).
Observational Astronomy for Amateurs by J.B Sidgwick (available from Amazon)
Articles and blogs:
CVnet-CVs for Visual Observers
Small Scope Sampler 
Stars to avoid: Historically observed stars now known to be constant 
LPV Section Forum
The Usefulness of Visual Observations 
Tools and other resources:
Lists of LPVs with magnitudes, types and activity levels
CVnet CV Circular
Lists of CVs with magnitudes, types and activity levels