Animations and there "short cuts"

In animations for Television I have notests that there are a lot of things they use and do to make there life'seasier in there animation.
Here is a list of the ones i have seen and studdied so far.

1. Still frames :
   More common in thing like Japanese anime, this is where a animation hold a single frame, some times up to a few seconds with out any animation or movement.  
   Naruto also took it one stage further by designing the migratory of there characters with face masks so would also talk on these still frames, and no need for talking animation.
2. Smear drawings:
   The snapping Quickly from one action to an other and drawing these smeared looking drawing in between.Used a lot by chuck jones and loony tunes. this makes key actions quicker and easier to animate. 
   Also gives it a nice feel or rushing in the animation, also  Running with smugged/blurred lines, just look at sonic!
3. Zip Line!:
   Animation of a character walking can be long and expencive so to save time and animation they used a zip line. this is a smoke and a line of them going out of frame. here a good video explaining
   
4. Halfing the frame rate:
   Not as common on English television but more on internet videos. they half the frames needed from 24 to 12 frames, making animation a lot quicker.
5. Library animation:
   More common in digital and most recent animation, this is where they have a library of pre-made animation, sutch as walk cycles , butterflys or anything used commonly in the animation.
6. Rigd animation:
   Also more common in recent animation, This is where a character is rigged even in 2D to help it to be moved easyer frame to frame.
   
   this can make an animation look quight static tho.
7. 2 frame animation:
   I don't know the name of this, but its where what would be a still frame flicks from one drawing back to an other giving an ilushion of contusion animation. I notest this most in things like Bill plympton animations.
   
8. Simplified color/shading:
   A limmited amont of colors or no color at all. and also no shading used migratory of the time.
   
9. Simple/limited backgrounds:
   most animations, ether reuse more complicated backgrounds and scenes so they dont need to keep recreating them. Or simple backgrounds just showing key elemental needed. s
   (simple background)
   
   A more complicated, reused background
10. Added Camra Effects
    done after animation to make it feel like it has more moment they shift the camera movement in post production.
    
11. More talk less walk :D
    You notice in older animation they talk about everything. its a lot cheaper and easier to animate them animating all the actions if they can just say whats happening instead.