I used to have a lot of night mares and due to that I could not sleep at night. But now before sleeping I recite 11 times

اَعُوْذُ بِاللہِ مِنَ الشَّیْطٰنِ الرَّجِیْم۔بِسْمِ اللہِ الرَّحْمٰنِ الرَّحِیْمِ۔لَاحَوْلَ وَلَا قُوَّۃَ اِلَّا بِاللّٰہِ الْعَلِیِّ الْعَظِیْمِ

and used to do the procedure of Bed tea which enabled to sleep well. 

The procedure of bed tea which is as follows:

In morning when you will get up from sleep then before getting up from bed recite 11 times

{’’یَاحَفِیْظُ‘‘}( and then get up from bed.

Muhammad Hassan Rehman Lahore