This is the mechanism which brings the Word of God to life. The lector must be skilled in this form of public speaking and must have mastered the specific reading to play his or her part in this essential process. If the Missalettes are used by the Assembly, people should put the them down and listen attentively during the readings so that this essential dynamic of speaking and hearing can occur. An effective lector will be bring so much to the reading with voice and gesture that people will automatically shift their attention away from their booklets if they've not put them down. To be effective, the lector must be prepared.
Technical expertise is essential, as is preparatory study of the particular reading.
Perhaps the best way to study scripture is with groups of lectors working together, since they can read aloud and listen as they study, and share the revelations that result. This may not be practical in your parish, however, so you may have to study on your own. But even in that case, it helps to read to someone informally, perhaps to a family member, as part of your study. Get used to the sound of the readings, and gain insights as you practice. Start your preparation early in the week before your turn.