According to the Gita, the best specific activity according to Krishna itself is declared more directly in BG 18.65: “Your mind always occupies thinking about Me, turn to Me devout, offer me reverence and worship Me.” And its culmination in BG 18.66: “Give up all varieties of religion and only entrust yourself to Me. I will free you from all sinful reactions.” The most important practical action is smaraṇam—the constant memory of Krishna, which Srila Prabhupada emphasizes repeatedly.”