You might remember the meaning of the character 谦 with this easy mnemonic:
You may think that was a modest speech (讠), but many eyebrows (丷) were raised as you referred to your predecessor as a pig with a snout (彐) who's only skill is to eat grains (禾).
Using mnemonics to remember the meaning of Chinese characters like has a huge impact on how long to learn Mandarin it takes.