You might remember the meaning of the character 可 with this easy mnemonic:
Your wife is giving birth to another child. "I know you can feed one (一) mouth (口), but can you feed two mouths now?" your mom asked. "Of course, I can. With my trusty fishing hook (亅), I can provide for my family!" you answered confidently.
Using mnemonics to remember the meaning of Chinese characters like has a huge impact on how long to learn Mandarin it takes.