This mantra is for Narasimha, the incarnation of Vishnu with the head of a lion. His mantras are uniquely powerful for being calming and helping to maintain harmony especially in the family environment.
“OM Narasimha Ta Va Da So Hoom”
You can repeat this mantra either using a mala to count in multiples of 108, or use the clock so you repeat the manta for 10 minutes at a time. Mantras should be repeated easily and you can have eyes open or closed, as you prefer. This is not mental exercise! Relax into your practice and try to be consistent for 3-4 weeks. Don’t over do it, a little bit each day will work wonders.