don't love this world too much
Allah says: No, it is not like that. Truly you love this present life (Al-Qiyamah: 20).
Also: You love wealth with excessive love (Al-Fajr: 20).
Loving these things too much makes people too busy to do good deeds.
(from Syajaratul Ma‘arif, Syaikh al-‘Izz bin Abdus Salam)