The strange thing about predictions, astrological or otherwise, is that they can very easily become self-fulfilling prophecies. In other words, you can make them come true, or you can interpret real events in such a way that they seem to have come true.
For instance, "all your woes are gonna end in 2014" -- you might have an accident that kills you: sure your woes are at an end, and it might be "favourable"....
Having done the astrology thing, I can say that my predictions has about an 80% (or higher) accuracy rate. But, before you link that to the astrology part, most of my predictions were based on reading the person, not the stars. I'd make the predictions for things they wanted to happen, and that they were already in the process of making happen.
(note: my version was for entertainment, not because I'm a great astrologer or psychic, and never intended to be more than just a giving people permission to do what they were going to do regardless.)
Think of it this way: the stars are impersonal, and they don't give a damn about what you want, think or what you can do!