You might remember the meaning of the character 豆 with this easy mnemonic:
I bought one (一) too many beans and I can't bring myself to open my mouth (口) anymore. I'm pulling out my eyebrows (丷) trying to think of what to do with the rest of the beans (豆)!
Using mnemonics to remember the meaning of Chinese characters like has a huge impact on how long to learn Mandarin it takes.