Ravivar, or Sunday, is the day to worship Lord Surya or Sun. Lord Surya has very importance in Hinduism. Sun is the central point of Universe. To get the best result you should sing Ravivar Aarti early morning after taking bath and in front of God rama Idol or picture. ( Ravivar /Sunday Aarti)
The Navagraha Chalisa is a powerful prayer which eliminates the adverse effects of all the nine graha (planets) Sun, Moon, Mars, Mercury, Jupiter, Venus, Saturn, Rahu and Ketu. The recitation of this prayer is beneficial in bringing harmony into your life and keeping the balance intact. ( Navagraha Chalisa नवग्रह चालीसा)
Navghraha Chalisa : श्री नवग्रह चालीसा
Surya Chalisa (40 Lines ) when chanted with full voice produces lot of energy in your body.