You might remember the meaning of the character 义 with this easy mnemonic:
There's a dot (丶) on the floor. You walked up to it to try and decipher its meaning. All of a sudden, you feel your back being slashed (丿). That's the handiwork of the dot murderer.
Using mnemonics to remember the meaning of Chinese characters like has a huge impact on how long to learn Mandarin it takes.