One of the best ways to memorize new vocabularies is through the use of flashcards. Right now, I’m using an app called flashcards+ to memorize Korean vocabularies, and it’e been proven effective so far.
The app can be downloaded for free, straight from the google play market. The app is capable of downloading flashcard decks made by other users from Quizlet and Studystack, and also gives you the option of creating your own flashcard deck right on your phone. A perfect method if you live in Korea like me and stumble upon new vocabularies all the time.
It should be noted though, that some of the pre-made Korean vocabularies are misspelled, so make sure to check the validity of the words before attempting to completely memorize the word.