A pretty comprehensive and pretty cool guide to stick animation, with a pair of cool tracks as background music to boot. This may have been intended for the software of its era, but much of it still holds up today.
If you're wondering what the tracks are, Track 1 is "Stupid MF" by Mindless Self Indulgence (https://www.youtube.com/watch?v=fjLVijzJ9SI), and Track 2 is "Madness7" by cheshyre (https://www.newgrounds.com/audio/listen/81367).