1. You’ll have different expectations
You may have known your best friend since birth and pride yourself in knowing everything about her, but there’s a chance she has a different routine and expectation from what you’d imagined. A holiday to you might mean waking up before sunrise to maximise the time you have but for your best friend, it might be sleeping in to rejuvenate and take things slowly.
Before you embark on your holiday, have a discussion with each other to figure out all these possible clashes and find a compromise.