There is a huge treasure trove of info to find in the Glitch Forums, but sadly, not much of a way to find them besides browsing through all of the pages. So this is the purpose of this thread.
Strategy
How to "win" at Glitch: A Newbie Guide
Resources
Full World Map
Giant List of Locations for Traveler Achievements
Greasemonkey Scripts
List of Achievements by Subject/Type
External Websites
FavorSaver - Take the guesswork out of donations!
Glitch Academy - Skill queuer
Welcome to Glitch*BRGR. The cheapest food with the most energy.
Non-Forum Links
Glitch Resource Database
Glitch Wiki
More to come later! Feel free to post suggestions.