How A Spner Goes To Sleep?

[A_seeker]

Earlier When I went to bed I was told to mentally remember waheguru ,waheguru (Simran).But repetition is not a part of Nanak philosophy. So since i am on this new path of authentic Sikhi . I would like to Know from you all what is the best way of ending a day in a truly Gurmat way .
What is the absolute final activity on bed before Slumber? How can Gurbani Philosophy help us in this activity ?

Bhul Chuk Maff