Shaykh Saalih Al-Fawzaan was asked:

Question:

How does taking oneself to account done in Ramadan?

Answer:

“Taking oneself to account is completed by everyone remembering their actions and remembering what has occurred from them of sin and opposition. Then repent to Allah. Everyone knows himself and everyone knows his actions”

[Reference]

Translated by

Faisal Ibn Abdul Qaadir Ibn Hassan
Abu Sulaymaan