Hi,
Chanting simple Ketu/Lord Ganesha mantras or offering special prayers to Lord Ganesha is a general remedy for Ketu. On my part, I’d like to reiterate the combined influence of all malefic Plantes/Grahas (Rahu and Mars/Kuja by way of aspects, close conjunction of Saturn/Shani-dev and Ketu (as also Sun/Ravi and Mercury/Budha) is posited in the Lunar Constellation of Hasta Nakshatra, ruled by Moon/Chandra can be a little overbearing and depressing. Appeasing all of them and strengthening Moon/Chandra and into your mind is really important. On the sidelines, practicing Yogasana, Pranayama and Meditation will be beneficial for you…
Take care…