Foundations of Animation
angryanimator.com
angryanimator.com
https://www.amazon.com/Animators-Survival-Kit-Richard-Willia...
Most of the points from the article seem to be derived from the stuff the book covers in more details.
The whole article focuses on expanding a list of principles of animation from Illusion.
1: https://www.amazon.com/Illusion-Life-Disney-Animation/dp/078...
2: https://www.amazon.com/Cartoon-Animation-Collectors-Preston-...
https://www.youtube.com/watch?v=uDqjIdI4bF4
(by the author of Animation vs Animator)
I second Animator's Survival Kit by Richard Williams, it's great. And Keith Lango's video course for 3D animation. These two are absolute best for learning intermediate/advanced animation.
Also, of course, Animation Mentor and 11secondclub competition.
When all the details came out of what he'd been doing to Robyn, Katie, and a long string of other women, all my art skills felt tainted and nasty.
I'd prefer to attach warnings to all mentions of his stuff, to help anyone looking to learn about drawing know what they are getting into.
Also, from the article: "The sequence is not ordered by priority."