占
=
⺊
+
口
:
Mnemonic symbol: a yellow umbrella. James II of England (zh) occupies (占) the anthill's bathroom (an4). He uses a pennant (⺊) stuck into a mandarin (口) to mark his territory. The ants are silently protesting with yellow umbrellas (占).
中
=
丨
+
口
:
Mnemonic symbol: a dart board, because you always try to hit the center.
Julian Giant Squid (zhu-) is throwing dinosaur bones (丨) as darts on a dart board in front of the engine ((e)ng1). To make it a bit more difficult he's throwing mandarins (口) into the air as well and skewers them up right in the center (中 is a mandarin skewered on a dinosaur bone) in mid flight with the dinosaur bones. He's still able to consistently hit the center (中) of the dart board.