There are two basic rules to recite Mahatmyam. First one is Trawangam in which devotee recites three prayers i.e, Devi Kavacham, Argala Stotram and Devi Keelakam. The Second one is Navangam in which chanter should chant 9 prayers - Devi Nyasa, Devi Avahana, Devi Namani, Argala Stotram, Keelaka Stotram, Devi Hrudaya, Dhala, Devi Dhyana and Devi Kavacha before reading Devi Mahatmyam.