Please participate in the singing and responses. Come to Mass early enough not to disrupt and leave late enough not to insult. The Mass does not end until the final song has been completed. Worship reverently enough not to distract. This includes silence in the church and the spirit of quiet in the vestibule before Mass.
Be mindful to turn off your electronic devices and quietly put the kneelers up and down during the Mass.
Dress modestly and appropriately as you would for any special occasion.