Something I do each day in the aim of speeding up my workflow is a 30 minute animation exercise. I'm using the Animation Mentor Stewart rig, a great rig that's easy to use on the fly. If you're interested, it also is the first rig I've seen with a ik/fk matching script built into the anim controls. 10/10, would toggle.
They aren't polished by any means, I intend to keep these exercises as a short form idea display- sketching but for animation if you will :D
Here's the first batch, I'll post a few a day over the next couple days until the blog is current with my latest. All chronologically ordered from the past number of months, I hope you note some advancement through the vids.