“Baba also mentioned that before sleeping, one should write with one’s finger his Iista mantra on the place where he lays his head. Then, he should visualize that he is placing his body and everything else at His lotus feet. After that, he will be able to sleep peacefully. In this case, Parama Purusa Himself would personally guard us because while the unit mind sleeps and takes rest, the Cosmic Mind never rests!”
from a post by Sudhiindra