You might remember the meaning of the character 遗 with this easy mnemonic:
I always lose my train of thought when I'm walking (辶) by the beach with an ice cream cone in my mouth (口). I get so distracted by the beautiful scenery that sometimes I can't even walk in one (一) straight line (丨), and would cut myself on shells (贝) on the beach.
Using mnemonics to remember the meaning of Chinese characters like has a huge impact on how long to learn Mandarin it takes.