We had a lesson last Sunday about the importance of daily scripture study. The sister who taught Relief Society said that if we read the Book of Mormon every day, everything else in our lives will fall into place. I have seen this in the short time I've been out in my mission. I have begun reading the Book of Mormon regularly (I know, I've always been bad with scripture study!). It's helped me maintain a clear perspective of the purpose of missionary work which has helped me maintain vision and faith every day.