I attend Vespers the night before, do Confession, read all the prayers in preparation for Communion (both before I go to bed and again when I get up in the morning--if I get to church early, I start reading them again), I fast from everything after midnight (which is really difficult because I sing in the choir and my throat is so parched before we take Communion--I miss the water more than the food), and I am there for the entire service. My priest expects us to confess each time before receiving Communion if we receive Communion once a month or less. As I attend a mission without a resident priest, and he gets here once a month for vespers and liturgy, all the members of our mission are expected to confess each time. The weeks that we don't have a priest, we hold typica services. How frequently you confess is worked out with your priest.