This year Mercury goes retrograde four times; and the third time is about to begin. What you need to know is to avoid certain purchases - specifically, ground transportation and items of communication. (Cars, trucks, bikes, computers, printers and cell phones.) Note: Before and after Mercury is retrograde, there are shadow times when it's still not good to make a big purchase. The actual retrograde time is from Aug. 13 to Sept. 5; however, to be safe, avoid major purchases from July 30 - Sept. 20. Forewarned is forearmed! It's okay to buy other items. Just check details because these are error prone times. Imagine is your errors were counted and published every day like those of a baseball player? Oy! Thank heavens pencils have erasers.