侘

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).

宅 = 乇 + 宀 : Mnemonic symbol: hanging around at home playing video games. After graduating, James II of England (zh) stays at home all day (宅) playing video games in the airplane's kitchen (ai2) while wearing his graduation cap (宀). He plays a game where he has to yield a blade of grass (乇) to control the sword master in his video game.