斗
=
⺀
+
十
:
Mnemonic symbol: a 斗牛士 (dou4 niu2 shi4) is a matador, who will represent 斗 when used as component.
The matador (斗) and Don Quixote (d) are fighting (斗) in the outhouse's bathroom (ou4) about who may use the bathroom next. The matador yields a holy cross (十) as a weapon, while Don Quixote (d) wisely chose a blossom (⺀) to cushion the crosses' blows.
地
=
也
+
土
:
Dorothy Gale (di) hates the cleanliness of the space station, so she used an excavator (也) in the space station's bathroom (Ø4) to dig a pile of dirt (土) out of the ground (地) for a mud bath.
主
=
丶
+
王
:
Julian Giant Squid (zhu) is playing cards with Martin Luther King (王) in the space station (Ø3). It's Martin Luther King's turn, and he holds a petal (丶) in his hand high above his head: it's his trump card, and on it depicted is the Lord (主) himself.