When we travel, we always have several paper copies of our e-tickets scattered among our carry-on bags. We also have paper copies of the timetables of the trains we will be on. Paper copies can be referred to at any time and aren’t subject to being lost in cyber space should some event occur that wipes out all the information contained in our laptop or makes it otherwise unavailable.I'm obsessed with looking at a simple concise summary printed on paper that I can circle things, scribble notes on, and compare times at a glance. Maybe even hold two of them together to easily work out connection times and cross-reference other information.