You might remember the meaning of the character 剪 with this easy mnemonic:
My sister tried trimming her eyebrows (丷) with one (一) pair of scissors, and did it under moon (月) light. It looked like someone cut her bangs with razors (刂) or a knife (刀)!
Using mnemonics to remember the meaning of Chinese characters like has a huge impact on how long to learn Mandarin it takes.