What are the supplications (du'as) or Quranic surahs that help with focus and overcoming severe laziness, and what are the recommended times for studying, especially as exams approach?

The best supplication is the one narrated from the Prophet, peace and blessings be upon him: "O Allah, I seek refuge in You from anxiety and sorrow, and from inability and laziness, and from stinginess and cowardice, and from the burden of debt and the domination of men." It is also recommended to repeat seeking refuge from laziness morning and evening by saying: "O Allah, I seek refuge in You from laziness and old age, and from the evil of old age, and from the trial of this world, and from the torment of the grave." From the Qur'an, the best way for a Muslim to seek refuge is by reciting the two surahs of seeking refuge (Al-Falaq and An-Nas). The Prophet, peace and blessings be upon him, used to recite them when complaining and would abandon other forms of seeking refuge for them.