You might remember the meaning of the character 感 with this easy mnemonic:
The local community felt disgusted when news reported discovery of a (一) body found at the base of a cliff (厂). Apparently, its mouth (口) and heart (心) had been cut out by a halberd (戈) discovered at the crime scene.
Using mnemonics to remember the meaning of Chinese characters like has a huge impact on how long to learn Mandarin it takes.