You could glean additional clues by keeping a journal based on workplace observations of executives with authoritative presence, says James Citrin, a CEO recruiter for search firm Spencer Stuart. Imitate their behaviors "that feel comfortable and natural for you," he recommends. Mr. Citrin cites a CEO candidate he recently watched being interviewed by the board search committee at a $10-billion company. Among other things, the prospect "looked the committee members alternately straight in the eye" as he answered their questions "slowly but very clearly.''