recently my father had demised and I had done all rituals at Rajahmundry as per our hindu customs and still I want to do some type of activity so that my fathers soul be happy and satisfactory always.

Answer: You can do the monthly mAsyams regularly on that thithi of his departure. Also to perform the Oona maasikams such as 27th, 45th day and the 6th month as stipulated by your Vaadyar. And living upto their expectations would certainly shower their blessings on you more aptly. You can also perform the Gaya Srardham after the Aabdeekam.