Vastu Shastra plays a vital role in the design of pooja rooms. According to Vastu, pooja rooms should ideally be placed in the northeast corner of the house to attract positive energy and good fortune. Ensure that the altar faces east or north, while the person praying should ideally face east. Keep the pooja room clutter-free, and use natural materials such as wood, stone, or marble for the construction. By following Vastu principles, your pooja room will promote peace and harmony in your home.