各 each

Allright! Let's call that weird thing on top your nose. You'll notice that it looks a LOT like the kanji for 'been a long time' : 久. But 久's diagonal lines do NOT cross. 　各's diagonal lines DO cross.

So! Now we are ready to do our mnemonic, which will help us remember the difference between the two kanji:

Each COCK in your mouth crosses your nose.

local train ★★☆☆☆
各 (each) + 駅 (train station) + 停 (bring to a halt) + 車 (car) = 各駅停車 (local train)

sure this is a scary and long word, but if you live here, you'll use it everyday： It means "local train" (literally, "stopping at each station train")

each xxx in its own way. ★★☆☆☆ 1/2 KANA

each thing in its own way. 各々考え方が違います。 (everyone thinks in their own way/ everyone has their own opinion).

each xxx respectively ★☆☆☆☆ PRE

PREFIX- you can put 各　in front of a noun to make it mean "each one, respectively"：each place, each thing, person.