Memorizing On'yomi and Kun'yomi

The easiest way to learn which reading is on’yomi or kun’yomi (without any extra time or effort) is to install [Userscript] WaniKani Katakana Madness. All of the pink kanji reviews will display your reading answers in katakana for on’yomi. If you get far enough with WK, easily distinguishing between the two becomes second-nature :upside_down_face: