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).
How do you develop positive thinking? Yoga teacher Shanmug Eckhardt gives you some important insights: Yoga masters teach Positive Thinking by unusual means. Shanmug tells a few stories of Swami Vishnu-devananda helping his disciples to develop strength and positive thinking. More information at www.yoga-vidya-org