In the hands of a skilled reader, astrology can be a useful tool. As proof, of sorts, I offer excerpts from Susan Miller’s forecast for Virgo, June 2010:

. . . Mars had spent an inordinately long time in Leo, reaching back to October 2009, and this is unusual. Mars typically spends seven weeks in a sign, not eight months! The placement of Mars in Leo put you in a holding pattern over the last months, but that’s about to end now.

. . .It’s also possible that you’ve had a lot of interaction with medical professionals lately, for the twelfth house rules health and healing. Perhaps you had surgery, needed long-term treatments, or required physical therapy.

One reason her forecasts are highly useful for me is that I am a double Virgo (sun and ascendant), others might find reading both forecasts for their different signs will yield a high probability of accuracy each month.