Having emails with my itinerary downloaded to my phone is usually enough to remember when I need to get to the airport. But, in countries with inconsistent internet access, this was surprisingly unreliable. Caches of the relevant emails were cleared unpredictably and I found myself stuck awkwardly waiting for my phone to fetch their contents from the internet.
In the future, I'll take screenshots of the relevant information, so I'll have it easily accessible regardless of internet speed or availability. In many ways, these screenshots play the same role as a print out, except they're easier to keep track of and easier to dispose of.
It's good to be reminded of times that I've become overly dependent on having consistent and reliable internet access. While I enjoy moving things to the "cloud", I still need to store some things locally.