Take the time, energy, resources, dedication, and care needed to do just that. It is here you will have your largest impact on a Scout. It is here that he will accept or reject this activity for life. Make it your mission for him to leave wanting to know more than what we offered him. Never lower your standards or those of Yawgoog or the BSA, keep them high.
Every requirement is to be done to the utmost degree.
Unfortunately you cannot be told how to bring this information across. It cannot be taught, but it is a learned trait you must find that is best suited for yourself.