Principles of Animation 2D Examples

Beautiful intro to the principles (hand drawn)

http://www.youtube.com/watch?v=UdU_g13L3zc

Squash and stretch animation:
http://www.youtube.com/watch?v=VaLESWaRMjU&feature=related
http://www.youtube.com/watch?v=I2iYl4OZ398&NR=1
http://www.youtube.com/watch?v=sJh4XHu1cGw&NR=1

Exaggeration:
http://www.youtube.com/watch?v=C6tK1sEQiek&feature=channel_video_title
http://www.youtube.com/watch?v=eLFtKXFAVvY&feature=related
http://www.youtube.com/watch?v=if3Y8PP_Qmg&NR=1

Keyframes:
http://www.youtube.com/watch?v=38jgiN1oA3Y&feature=related

Anticipation, Ease In (Acceleration)
http://www.youtube.com/user/animatortraining#p/u/40/hwS-VF2CcEw
http://www.youtube.com/watch?v=cOfaIhNy4_c&feature=related
http://www.youtube.com/watch?v=t_wbt7GtIOc&NR=1
http://www.youtube.com/watch?v=-gm8a__jGpk&feature=related
http://www.youtube.com/watch?v=_-pV9tBRlLU&feature=related

Follow Through:
http://www.youtube.com/watch?v=Tc4ZIPyr2Yg&feature=relmfu

Arcs and Waves:
http://www.youtube.com/watch?v=6ZEdOx2J_Fg
http://www.youtube.com/watch?v=z_G0SUmNos8
http://www.youtube.com/watch?v=KjQ9aB94I1k
http://www.youtube.com/watch?v=RpkSkT8lgMY&feature=related

Overlapping Action:
http://www.youtube.com/watch?v=C4b2lYaAPa0&feature=related
http://www.youtube.com/watch?v=lgcw2d4wFQw&feature=related

Staging:
http://www.youtube.com/watch?v=tAv7Dc_f8Vc&feature=related

Morphs:
http://www.youtube.com/watch?v=VQwXqi0XXHc&feature=related
http://www.youtube.com/watch?v=PnYVk-8jpuA&feature=related
http://www.youtube.com/watch?v=Z_wRv4OJS5A&feature=related
Class morphing animation: http://www.youtube.com/watch?v=OCtn4sWfZOA
Jill CSA animation:

Dialogue
http://www.youtube.com/watch?v=92lGeqewZSk&NR=1