Determine the series of movements you want to animate. For example, a man claps his hands and his dog runs into the room.
Start by drawing the first picture of what a man would look like in still form as he is about to clap his hands.
Draw each and every partial movement as he begins to clap and clap. Watch yourself in the mirror or have a friend do the movements to get each partial move as natural as possible.
Draw the figure of the dog as it enters the room. Draw each movement and partial movement of the dog entering and going to his master.
Each drawing should be similar to one tenth of a second in movement, meaning you'd draw 10 drawings for each second of animated movement. (This is a very basic demonstration; hundreds of drawings could be used in a second in a modern computer animation).
Film each drawing. It should be about 4 to 5 frames of film or 1 tenth of a second in video or digital. When played after filming, the movement will be a little off, but the movement should flow.