Swasti Vaachan, Shanti Path, Sankalp, Ganesh Sthapan, Kalash Sthapan, Brihaspati Sthapan, Navgrah Sthapan, Agni Sthapan, Guru-Rahu / Guru-Ketu Yantra Puja, Guru-Rahu / Guru-Ketu Mantra Japa, Brihaspati Puja, Rahu / Ketu Puja, Homa with Honey, Ghee, Sugar, Til, Ashtagandh, Sandalwood powder, Navgrah Samidha and then Purnahuti, Aarti and Prasad to Brahmins
When Guru (Jupiter) is joined with Rahu or Ketu in same house of a horoscope or they are completely aspecting each other it results in Guru Chandaal Dosh.
If a shadowy planet like Rahu or Ketu joins Guru, it destroys the benefic qualities of this planet. It results in disturbance in education, lack of focus, insecurity in professional and personal lives, makes one slothful, fortune or luck factor is minimized. It creates delusions in the mind which makes decision making faulty, the person becomes egoistic and prone to temper tantrums. Making the person a complete antithesis of what the benign planet Guru represents.