亻
=
丿
+
丨
:
Mnemonic symbol: Rosa Luxemburg. She's quite radical, and her name starts with "r", just like "ren2". Also, 亻appears at the left-hand side of characters, and Rosa is a leftist as well.
Robinson Crusoe (r) and Rosa Luxemburg (亻) are having their favorite snacks in the encampment's kitchen: Rosa is eating a banana (丿) and Robinson is eating a dinosaur bone (丨).
秋
=
火
+
禾
:
Mnemonic symbol: from 秋千 (qiu1 qian1), swing (seat hung from a frame or branch).
The Queen of Hearts (qi) celebrates autumn (秋) by offering sacrifices. She puts a bowl of cereals (禾) onto a swing (秋) and has the cereals swing into a fire (火) in front of the outhouse (ou1).