It’s happening again and since I spent four hours yesterday doing something with my computer that should have taken 30 minutes, I thought this would be a good time to talk about it.  But I’m not  an expert on the subject so here’s an excellent description of what’s going on from CafeAstrology.com:

What is Mercury Retrograde? Three, and sometimes four, times a year, the planet Mercury appears to be moving backwards in the sky for a period of approximately 3 weeks. “Appears” is the key word here, because, technically speaking, no planet actually moves backwards in their orbits around the Sun. In fact, they don’t even slow down. Retrograde-station-direct cycles are essentially illusions that result from our point of view from Earth, simply because the Earth is also orbiting the Sun at a different speed than the other planets. Mercury turns retrograde more frequently than any other planet. It can never be more than 28 degrees from the Sun, and whenever it reaches its furthest distance from the Sun, it changes direction.

Mercury is retrograde from November 24 to December 13, 2011.

As the planet of communication, Mercury retrograde tends to breed a certain level of confusion. Mercury rules our “lower” mind–how we perceive and interpret information that we receive from our environment, and how we relay that information to others. Mercury has rulership over such things as speaking, negotiating, buying and selling, listening, formal contracts, documents, travel, the mail and shipping, and so forth. All of these areas of life are affected when Mercury is functioning in a sluggish state. Decision-making is challenged during Mercury retrograde. Needless to say, it is not advised to sign contracts, engage in important decision-making, or launch a new business. Delays and challenges are more probable with Mercury retrograde. It’s a time when being careless with money, our personal information, or paperwork can be costly.

There is a positive side to Mercury Retrograde. This period is best used for re-organizing and reflecting. We look at the world a little differently–through different filters–and can come up with some very important inner revelations. It may be difficult to communicate them under this influence, but not everything needs to be rationalized. Mercury retrograde periods can be times of heightened inner awareness, when meditation, benefiting from keeping a journal, reworking old plans, and reviewing past work are favored. Minor breaks in the mechanical aspects of communication can actually re-connect us to other means of communication, such as when there is an unexpected power outage and we’re forced off the computer and television, finding different and often satisfying ways to entertain ourselves.

It is important to note that there is absolutely no reason to suspend projects or anything of the sort during the Mercury Retrograde cycle. It’s not an ideal time to start new ones or to sign contracts, simply because a change of mind is very possible once Mercury turns direct. However, it’s a fabulous time to do some “outside of the box” thinking. Acting on our ideas, however, might be best left for a Mercury Direct period.

Not everyone feels the effects of Mercury retrograde. Those born with Mercury retrograde in their natal chart, for example, may not notice the effects described above. Pay close attention to what you say and communicate in general, particularly around the days of Mercury’s stations (November 23/24 and December 13th). If you are itching to argue with someone, especially, or if you are planning on “signing on the dotted line”, try to hold off. It is likely that you will have a change of mind once the station passes, and you can do some damage in the meantime.