Intuitive Divination: Crystallomancy, Hydromancy and Pyromancy
Addresses several methods and mediums of scrying.
http://www.geocities.com/~firesilk/lecture15.html

An Overview of Different Types of Scrying
An article outlining several different methods of scrying.
http://realmagick.com/articles/56/2056.html

Scrying
Includes brief history, preparation, and practice.
http://www.mystic-mouse.co.uk/WisdomTexts/Scrying.htm

Scrying
Explores many of the scrying techniques and tools used in detail.
http://www.crystalinks.com/scrying.html

Scrying
Explores the definition and methods of scrying, along with a simple relaxation exercise.
http://members.aol.com/_ht_a/davehypno/scrying.html

Scrying Procedures
A how-to with no particular medium focus.
http://astralthyme.com/scryingprocedure.html

Scrying
Addresses the history on scrying with a brief on methods.
http://www.themystica.com/mystica/articles/s/scrying.html

Spiral Nature- Scrying, by Psyche
Instructional article on scrying.
http://www.spiralnature.com/magick/divin/scrying.html

Using Scrying To See How A Genius Works
Parallels scrying with dreams, and gives a glimpse of the historical social perspective of scrying, and why it isn't fully understood.
http://www.humboldt.edu/~jlw47/usingscrying.html

A Short Course in Scrying
This document was originally presented as a series of posts on the "enochian-l" and "Praxis" email lists. Also applies scrying skills to Enochian magick.
http://www.hermetic.com/browe-archive/ashort.htm