Things tend to get crazy when Mercury turns retrograde. It won’t be crazy on a large scale like mass hysteria or popular delusions. It will be more along the lines of the things you rely on every day — like your car, computer or smartphone — staging an open revolt. Anything that these once trusted vehicles and tools can do to mess up your day, they will. This is why many astrologers will advise you to take extra precautions. Whether it’s taking the car in for a tune-up, backing up your computer or updating your security software, you want to be proactive and prepared. This may not prevent anything from running afoul, but it will cut down on the stress levels. Mercury will be retrograde from Jan. 21 to Feb. 11.