To continue with Lesson No. 1:
Encourage the clever. Many very intelligent individuals purposely talk commonplace to avoid the appearance of egotism. With encouragement, however, they may contribute much of interest and value. When you know a person is particularly gifted in certain ways or has had unusual experiences, lead him to talk about them.Share
The place does not matter as much as the people. You will find that the dinner table, a yachting trip, or a beach picnic are all excellent places in which to discuss interesting questions. In fact, wherever there is conversational guidance, stimulating thoughts may germinate which will add to the pleasure and inspiration of the morrow....
Vocabulary: ...As your ideas become more varied and interesting your vocabulary grows apace. You acquire abundant reserve of words to clothe your thoughts fittingly.
The most interesting as well as the simplest way of increasing your vocabulary is to note words which are used too often, substituting other words for them. Take the word "nice" for instance. We have "nice" weather, "nice" people, "nice" jobs, "nice" clothes, until "nice" loses all its personality and descriptive qualities. Drop "nice" out of your vocabulary entirely. Whenever you start to use it, decide to substitute another word which clearly expresses your meaning. For example, say invigorating weather, intelligent people, creative jobs, smart clothes.
Apply this principle to all over-worked words and phrases whether you use them yourself or hear them used....
Slang expressions have no value to you unless you originate them. Create your own phrases if you would become a distinctive speaker. Above all, avoid trite, commonplace words and phrases which have long since lost their color or meaning.
Voice Culture: ...Many fine ideas have fallen on deaf ears because of a monotonous or harsh speaking voice. For this reason your voice plays a very important part in conversation....
Diction: Unless you enunciate clearly, pronounce accurately, and choose distinctive expressions for your thoughts, you suffer a needless conversational handicap....
Carve your words. Slurring speech is one of the worst habits of the average person. Especially is this true in connection with the final consonants which often are permitted to merge with the word following....
~ The Ethel Cotton Course in Conversation, Lesson No.1. Chicago: Conversation Studies, 1949, pp. 10, 19-21