Drawing just one card is the easiest and probably the most common method of reading. Without a storyline like when interpreting a spread, there are no cards to compare and contrast. Simply interpret the card as the answer to the question.
Alternatively, this method may be used repeatedly in succession to allow the cards to tell a story.
Deviousness, plotting, hypocrisy, lies, a warning that something is not what it seems, worldly logic, temptations, trickery. When facing away from the affected card, it means absolute honesty and survival instincts.