How can one overcome wasting time, absentmindedness, the devil's dominion, dwelling on past sins, and problems related to time constraints, while not neglecting memorizing the Qur'an, seeking knowledge, or self-nurturing, and should one turn the page on a past that causes a feeling of failure?

If a servant repents with sincere repentance that fulfills all conditions, then forgetting the sin does not harm him. In fact, remembering sins is not praiseworthy unless it motivates one to perform good deeds that expiate them and renew the meanings of repentance, or if it does not disturb the purity of a greater act of obedience. Therefore, one must turn away from the whispers of remembering sins and focus on obeying Allah, memorizing the Qur’an, and seeking knowledge. Given the limited time, one should prioritize the most beneficial and important sciences and organize time for maximum benefit.