Augury -- whether art, science or gift -- can't be an easy path to follow. If the plague of locusts you predict for next week doesn't turn up, your credibility is going to take a big hit; conversely, if your prophesies target events so far into the future that you'll be dead and gone long before they fail to materialize, then you can't exactly establish a track record while you're living. And as stock analysts and tipsters know all too well, you're only as good as your last pick.