Chandra (Moon) beej mantra

The Chandra is connected to mind (thoughts), emotions, feelings and attitudes. You can notice in full-moon, half-moon and no-moon, among these three transitions as the moon moves it somehow also impacts to some people partially (remain unnoticed) and to some people substantially. It affects substantially due to mind at unrest and it can blow the mind any way. So, either calm down the mid or calm down the affects of moon.
The mantra helps because it generates vibrations, and gives a shield.
Chandra beej mantra:

Om Shram Shrom Saha Chandramase Namaha

Or, Simply:

Om Chandraya Namaha

108 times –>