Practice tests that mimic the exact format of the JLPT N4 exam.
A PDF can be stored on a tablet, phone, or laptop. You can search within the PDF for a specific kanji (e.g., search "働" ) and instantly find every instance. You cannot do that easily with a paper book. shin kanzen master n4 kanji pdf
Open a chapter. Look at the list of new kanji. Try to guess the meaning from the radicals (e.g., see 氵 = water). Do not memorize yet. Just get familiar. Practice tests that mimic the exact format of