During a satsang at Yoga Vidya in Bad Meinberg Shankari chants the mantra for the worship of the three-eyed mother Narayani:
Om Sarva Mangala Mangalya
Shive Sarvãrtha Sãdhike
Sharanya Tryambake Gauri
This mantra is chanted at the end of the Gajananam and Guru Stotram (Yoga Vidya Songbook No. 603 and 690). Narayani brings happiness and meets all requirements of the viewfinder (both material as well as spiritual).
More information about yoga, meditation and ayurveda can be found on the website of Yoga Vidya.