How can one get rid of laziness, strengthen determination in decision-making, and improve methods of academic achievement and memorization in studies?

The cure for laziness is to seek refuge with Allah and turn to Him. The Prophet, peace and blessings be upon him, used to seek refuge with Allah from helplessness and laziness. As for indecisiveness in making decisions, it is cured by strong resolve and determination after relying on Allah Almighty.