Examples of OmniFocus tags that help you quickly hone in on the OmniFocus projects and actions that are most relevant.
First Look: OmniFocus 4 for Mac - Learn OmniFocus
OmniFocus for Web Review: Access Your Tasks Everywhere - MacStories
OmniFocus Tags Directory - Learn OmniFocus
Using nested parent/child hierarchies in tags - OmniFocus - The Omni Group User Forums
Sorting OmniFocus Actions, Projects, Folders & Contexts - Learn OmniFocus
Get Stuff Done with OmniFocus 3 - video course
Omni Group Resources - Learn OmniFocus
An Abundance of OmniFocus Tags – Kaitlin Salzke
Get tag from task with shortcuts - OmniFocus Automation - The Omni Group User Forums
Move Omnifocus actions to Reminders - Shortcuts - Automators Talk
Thacher (until I come up with a nickname for here) (@dapperthacher
Getting Things Done® - Inside OmniFocus
Let's Fix OmniFocus — Paul Sahner
Custom Perspectives for OmniFocus - Learn OmniFocus
OmniFocus 3: What's New and What's Blue in Task Management - TidBITS