This is one of the most popular and powerful of all of the Vedic mantras. It calls upon Lord Shiva, "the Three-eyed God," to grant protection, abundance, and enlightenment to the devotee. I have put together a short video to help facilitate the chanting of this great mantra.
OM tryambakaṃ yajāmahe sugandhim puṣṭivardhanam
Urvārukamiva bandhanān-mṛtyormukṣīya māmṛtāt
"We invoke and do homage to the three-eyed Lord [Shiva], creator and protector of the three worlds, whose immanent fragrance of energy and bliss enhances the life and joy of existence all three times. O Rudra, destroyer of evil and suffering, giver of bliss, Release me from the bonds of mortality like the ripe melon falling off the stalk and redeem me into the infinite presence of Immortality."