With an additional day, you can plan a visit to nearby locations like Kanchipuram and Mahabalipuram. The Kanipakam Ganapathi temple is also worth a visit. On the first day, it's best to wake up early and start queuing at the temple as darshan times can be tremendously long. On the second day, it's best to combine Padmavathi Temple and Silathoranam in a single trip as they're nearby. Also, always carry enough water and snacks to avoid dehydration as darshan queues can take up to 10 hours during peak season.