What are the righteous deeds that one stores away for the Day of Reckoning?

One must prepare for the Day of Judgment at every moment by performing the obligatory duties and avoiding the forbidden acts, for Allah Almighty says: (And fear a Day when you will be returned to Allah. Then every soul will be compensated for what it earned, and they will not be wronged). Then, one should draw closer to Allah through various voluntary acts, according to one's ability, with sincerity to Allah and adherence to the Sunnah of the Prophet, peace be upon him.