I usually plan Animations in paper in pose to pose as an example if i need animate 60 frames i do pose to pose in paper like this way

i draw the following frames 1, 10, 20, 30, 40, 50, 60 and in pc i do all other missing frames

in this way 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15.. and so on by using the Adobe flash, TvPaint-PRO or Toon Boom Harmony.

also in paper i also plan Colors too but in pc i just finish all decorations, colors, lines, and other things.