A Star Test Primer by Thomas Back - Good primer for star testing

Article on Optical Quality in Telescopes - The defacto double blind comparison of telescopes with different optical quality

Effects of poor Collimation on Images - Good information on the importance of good collimation

ST80 Gouge - Lots of information on how to get the most from your 80mm f5

More ST80 Tune Ups - Bob Berta's defacto tune-up guide for the ST80

Monthly sky maps - Great guide for what to see each month

Finder charts by constellation - Handy charts that are sorted by constellation

Skywatch Newsletter by Rod Mollise - Great newsletter with helpful information

Observing in Light Polluted Skies - great guide for observing in light polluted skies

Messier Guide - A nice self contained pdf on all the messier objects including pictures

How to Clean Optics by Al Nagler - This is the method I use for cleaning my optics

Todd Gross's Page - Excellent information and reviews of Astro products

Magnitude vs Aperture comparison chart

Simulated Planet images in different telescopes

Advice for first time scope buyers

Cloudynights - The best website for everything that has to do with amateur astronomy

Astronomical League - Great site for amateur astronomers.  Loads of observing aids

Collimation Gouge - written by Obsession Telescope

Filter Performance Comparisons for Some Common Nebulae - This is a great page on nebula filters
Autostar Iterative method of alignment

Top Ten Deep Sky Objects for This Month - Jenny Kay FRAS

Deep Sky Sketches and Observations - Excellent site with a lot of sketches for deep sky stuff

Get your exact coordinates online - Great for goto stuff

Matt Weir Telescope Simulator

Planetarium Software Programs - Comprehensive list of planetarium software for Win/Mac

Dark Sky Factor - Good site that outlines what kind of sky you have

Detailed Collimation - by Scott McCluney

Telescope and Eyepiece formulae - Great place for all those obscure formulae

http://www.astropix.com/HTML/B_WINTER/TRAPEZ.HTM

http://astronomy.trilobytes.com.au/martin-lewicki/saturnseeing.htm

http://home1.gte.net/amaroney/allen/ProjectPlans.htm

http://aa.usno.navy.mil/data/docs/diskmap.html

http://www.laughton.com/paul/rfo/trap/trap.html

http://mywebpages.comcast.net/bondono2/astro.html

http://www.phys.ksu.edu/~wysin/astro/magnitudes.html

http://www.fourmilab.ch/cgi-bin/uncgi/Solar

http://mysite.verizon.net/gpiepol/astroads.html

http://home.att.net/~jak.stargate/wsb/html/view.cgi-html2.html--SiteID-458422.html

http://home.fiam.net/ericj/aperture.html

http://www.maxon.net/sternkucker/artikel/transmission/transmission.html

http://www.cloudynights.com/beginners/eyepieces.htm