1. One who has more holiness, he is further away from sleep.
2. Through excessive sleeping and slumber, one is pushed out of the Merkava of Holiness (t.n. the chair of the Divine Presence), one's face changes, and one's G-dly image is corrupted.
3. The fifteen Songs of Ascent that are in the book of Tehillim (Psalms chapters 120-134) are propitious to annul sleep.
4. One who is unable to sleep should bring to mind faith in the Resurrection.