The two biggest things I worry about right before I'm getting ready to go on a cruise are 1) losing my license and/or passport and 2) falling and breaking or spraining something.

 I never carry my passport unless traveling so that is irrational but I am extra cautious with my license and debit cards a few days before I leave.  I'm klutzy and have a huge yellow lab that likes to drag me on the leash if a rabbit appears

What do you worry about when single digit days approach?