You don't need to take paper copies of your hotel/car rental confirmations. Almost always your name is sufficient to find you. Have the booking reference handy and a PDF of all the paper in the unlikely event you,actually need to prove you have a booking.
The Warsaw/Montreal conventions require that for international air transport you be issued a ticket. This too can be electronic and you don't need the paper.
I get most of my boarding cards electronically on my iPhone. Every European airport I've been to in the past five years can read a bar code off my phone.
Immigration at Toronto (I think) asked me for my ticket a couple of years back - no problem giving it to them on my phone.
Nobody needs paper in the 1st/2nd and much of the 3rd world these days.
Last edited by ExXB; 18th April 2016 at 12:34.
Reason: Trpos