The word mantra has two parts: "man," which in Sanskrit means "mind," and "tra," which means "instrument." A mantra is therefore an instrument of the mind, a powerful sound or vibration that you can use to enter a deep state of meditation.
Silently repeating a mantra as you meditate is a powerful way to enter the silence of the mind. As you repeat the mantra, it creates a mental vibration that allows the mind to experience deeper levels of awareness. The mantra then becomes increasingly abstract and indistinct, until you're finally led into the field of pure consciousness from which the vibration arose—your spirit.
**To pray, focus attention at the center between the eyebrows and say the prayer mentally with the deepest devotion of your heart. Repeat the prayer until it becomes one with your consciousness. Never pray to God as a begger but pray as God's child asking for a share of God's bounties and blessings through which anything is possible
*one should invoke lord ganesh mother saraswati and guru(supreme teacher)
Simply say om sri ganshaya namah om sri saraswatyai namah and om sri gurave namah
Guru Brahmaa Guru Vishnu Guru Devo Maheshwarah Guru Saakshaat Para Brahma Tasmai Shree Gurave Namah
Salutaions to that noble Teacher who is like Brahma,creating good and noble qualties and who is like Shiva destroying the negative (tamasic) qualties in us.Indeed,the true Guru,who removes spiritual darkness,is verily the Supreme Brahman.
The Royal Family