وَعَمِلَ لِمَا بَعْدَ الْمَوْتِ means doing deeds now that benefit one in the Hereafter. The prefix لِـ expresses purpose, while بَعْدَ الْمَوْتِ identifies the time after death.
Examples of self-accountability:
1. Where did I speak harshly or untruthfully today?
2. Am I holding someone’s trust or neglecting a right?
3. What will I do differently when the situation occurs again?
Self-accountability does not stop at identifying mistakes: it requires correction and persistence in good conduct.