بسم الله الرحمن الرحيم
Recite Surah al-Mulk once before going to bed as well the following dua 25 times:
اللهم بارك لي فى الموت وفيما بعد الموت .
In-shaAllah, you shall be safe from grave punishment and from the difficulties of the death. Also recite surah Yaseen once in the morning then in-shaAllah all your works shall be fulfilled in good manner.
Allah knows Best!
Darul Uloom Deoband