Image credits- Cento Lodigiani
http://creativebabble.com/the-12-basic-principles-of-animation-reimagined/
Disney's Twelve Principles
of Animation
12. Appeal
makes the caracter charismatic
11. Solid Drawings
gives characters volume and weight
10. Exaggeration
presenting reality in an wilder, more extreme form
9. Timing
correct timing gives the impression that objects obey the laws of physics
8. Secondary Action
gives more life to the scene and supports the main action
7. Arcs
almost all natural movements follow an arc pattern
6. Slow-In and Slow-Out
creates the illusion that objects need time to accelerate and slow down
5. Follow Through and Overlapping Action
used to give the impression that the drawn object follows the laws of physics
4. Straight Ahead and Pose to Pose
Pose to Pose means starting with a few keyframes, and filling the intervals later
Straight Ahead means drawing the entire scene frame by frame from begginning to end
3. Staging
Johnston and Thomas defined staging as "the presentation of any idea so that it is completely and unmistakably clear"
2. Anticipation
prepares the viewer for an upcoming action
1. Squash and Stretch
gives sense of weight and flexibility to drawn objects