1. Take notice of the selection of words you use in everyday conversation. Make note of expressions, idioms, colloquialisms, and vernacular that have both a literal and figurative meaning. List those that come to mind.
2. How often do you use negatives when you speak? If you are like most people, you probably use them quite often. It is said that the unconscious mind doesn't understand negatives. Try converting the negatives to positives. For example, when you say "I won't flunk this test," the unconscious mind translates this into "I will flunk this test". Jot down all of the negativisms you find yourself thinking or saying and then, next to each, write down a positive expression to use instead. For example, you could say "I will pass this test."
3. Take note of Freudian slips, that is, expressions that come out inadvertently when talking. Write these down as well and study them. By and large, they carry a message as well, if we take the time to listen.