Here is simple guided meditation practice you can do everyday. Here is beautiful description on power of Mantra from my spiritual teacher. “Mantra” means transcendental sound vibration, sound which transcends the material world. It does not originate in the material world; it originates in the Spiritual World and descends to the material platform without losing any spiritual potency. A mantra is not something that anyone can make up, but rather must be received through the spiritual master who has received it from his spiritual master who received it from his spiritual master, and so on. It is transmitted from spiritual master to disciple since time immemorial. There is no historical beginning; rather, the disciplic line begins with the Supreme Soul Himself. A mantra is the descent of the Supreme in the form of sound vibration, making it possible for us to receive Him. Hearing and repeating such sound vibration has the gradual effect of cleansing the heart and mind so that a person experiences his real identity more and more each day.