Communications go awry - phone calls, letters, emails, faxes, conversations are delayed, misinterpreted, blocked.  Recheck everything like appointment times, spelling, wording, the words you say.

Anticipate detours - memory lapses, confusion, failing to listen, failing to confirm, negotiation failures, changing of plans.

Avoid signing documents, contracts if possible. You can wait 3 weeks, hopefully.

Expect travel delays, car trouble, delayed plane schedules, reservations that suddenly becoming "missing", transportation difficulties of all kinds. 

Expect problems with messages, books, letters, magazines, documents, neighbors and the near environment.

BACK up your computer files!  This is the time the screen goes blank and there is nothing there!

Expect the phone lines, cable lines, power lines to have problems.