You might remember the meaning of the character 署 with this easy mnemonic:
Keep your mouth (口) shut in the office, because gossip spreads in ten (十) seconds if you tell even one (一) person about our secret. I will put earth (土) in your coffee powder, slash (丿) your salary in half and leave you out in the scorching sun (日) if you blab!
Using mnemonics to remember the meaning of Chinese characters like has a huge impact on how long to learn Mandarin it takes.