Useful Links

Here are some Second Life-related links that I find useful. 

SL Debug Settings

SL Client startup parameters

SL Grid Status

SL Shortcut Keys

Picture Aspect Ratios (short)
Picture Aspect Ratios (long) 

New Citizens Inc Events

Pastebin — good for collaborating on scripts

Color Vector Values

UUIDs of built-in sounds

Next-Owner Permissions on Objects

Permissions for Packaging Items