Here is a step-by-step guide on how to perform the Katyayani Puja for marriage at home: 1. Preparation: Gather all the necessary puja items, such as a picture or idol of Goddess Katyayani, roli, rice, kumkum, incense sticks, diya, flowers, sweets, and a puja thali. Clean and purify the puja area. 2. Invocation of Goddess Katyayani: Light the incense sticks and diya. Offer fresh flowers and rice to the idol or picture of the goddess. Chant the following mantra to invoke her presence: ‘Om Hrim Shrim Klim Adya Kalika Param Eshwari Swaha.’ 3. Aarti: Perform the Aarti of the goddess by waving a lighted diya in front of her idol or picture. 4. Offerings: Offer sweets, fruits, and other offerings to the goddess as a sign of devotion and respect. 5. Mantra chanting: Chant the following mantra 108 times while holding a rosary or counting the mantras on your fingers: “Om Devi Katyayani Namah.” 6. Prayers: Offer prayers to the goddess asking for her blessings for a happy and prosperous married life. 7. Concluding the Puja: Conclude the puja by singing the Aarti again and distributing sweets and prasad among all the members present in the puja. It is essential to follow all the rituals and customs with sincerity and devotion to receive the blessings of the goddess. The bride, groom, or a pandit can perform the puja.