Read the Qur'an regularly.
Imaam an-Nawawi رحمه الله said: “Reciting the Qur'aan is the most important of adhkar, which should be done regularly. No day or night should be without reciting and it may be attained by reciting a few verses.” ● [كتاب الأذكـار للنـووي ١٢٢٥/٢]
Ibn Jawzi رحمه الله تعالى said: “The one who has a Mushaf must recite it everyday of whatever is easy for him, lest he be from those who have forsaken the Qur’aan.“ ● [الآداب الشرعية ٢\٣٠٠]
Ibn Abbas رضي الله عنه said: “Allaah took responsibility for who reads the Qur'aan & ACTS ON what is in it; he won’t go astray in this life nor despair in the Hereafter.“ ● [مفتاح دار السعادة ٥٨/١]
Ibn Mas'ood رضي الله عنه said: “Qur’aan is the Speech of Allaah, uncreated, so indeed whoever loves Qur’aan then he loves Allaah.” ● [فقه الأدعية والأذكار ج١ ص٦٦]