You might remember the meaning of the character 还 with this easy mnemonic:
A village feared for the safety of its fishermen because it had been one (一) month but still none returned. One found a slashed (丿) ship plank on his walk (辶) on the beach. The village decided to hold a ceremony around the town's spiritual totem (卜) to pray.
Using mnemonics to remember the meaning of Chinese characters like has a huge impact on how long to learn Mandarin it takes.