We've created a repository to put excellent fitness information in one place.  You'll find all of our original content here, as well as useful information from around the Internet.  

Gains Lab Originals

Basics of Conditioning: An overview of the development of raw capacity   

Advanced Conditioning: A more detailed look into the development of capacity and translating capacity into performance

Squats Made Simple: A comprehensive look into the fundamental strength training exercise                              

Our thoughts on Squat Programs: How we think about training the squat and its applications in strength sports                                      

External but still excellent

We didn't make these, and we're not affiliated with the people who did.  But they're worth your time.

Cal Strength Snatch Part 1, Part 2, Part 3

Cal Strength Clean Part 1   Part 2   Part 3

Carl Paoli's Ring Muscle Up Progression

Dusty Hyland's Bar Muscle Up Video