KanjiJLPT N4
Next

next, order, sequence

Mnemonic

Standing on ice in a freezing queue, you let out a massive yawn. The wait has been brutal. Then the clerk shouts: 'Next!' The ice numbed your feet and the yawn showed everyone you'd been waiting forever—but finally, you're next in line.
Additional thoughts
Picture a DMV waiting room built on an ice rink. Your enormous yawn signals the agonizing boredom of waiting your turn. When 'Next!' is finally called, the relief is unforgettable. Ice sits on the left of the kanji, yawn on the right.
Quick recall
Freezing on ice, mid-yawn in a long queue—then the clerk finally calls 'Next!'

Details

The keyword for 次 is next. This kanji conveys the idea of what comes after or follows in a sequence, indicating the subsequent item, turn, or occasion in an order. It carries the sense of succession and continuity, pointing to whatever immediately follows the current position. It is also used to denote a secondary or subordinate rank, as in something that comes after the primary.
On'yomi
じ、し
Kun'yomi
つ.ぐ、つぎ