Judging in a favorable light is regarded in the Talmud as one of the key acts of kindness that we both enjoy the fruits of in this life, and are stored up as principal for the world to come. There is a list of these in the traditional prayer book, the Siddur, based on the Talmudic passages. But for some reason Judging Favorable does not appear in the list in the Siddur, which includes honoring father and mother, deeds of kindness, welcoming guests, visiting the sick, etc. I'd love to know why it's missing. Seems like a serious mistake to me.