We use MDE and as a backup I create a Word Document with a 1/2 page dedicated to each travel day. I keep that in my email, but I also snap a picture of each day and keep it in my phone photos (under a specifically named folder, like Disney 2014).
Several times on our recent trips, we have experienced glitches with MDE....(couldn't access, missing info, etc.) The photos provide a quick and easy backup. I also like that I can have everything neatly laid out in the order I will need it for the day, FPs, park hours for park hopping, ADRs, counter services we want to remember to try, reservation numbers for water park rentals, etc. I even include arrival and departure days with flight info, Magical Express reservation number, WDW package info, etc.