I've taken to carrying around small notebooks in my pocket recently.
I found that I never looked at notes written on my phone, but I do with paper.
It also has the advantage that I can tear pages out to give to people. No need to try and text a shopping list to someone when you can just give them one.
Perhaps more relevant now than ever with our smartphones and their infinite capacity for distraction.
http://www.43folders.com/2004/09/03/introducing-the-hipster-...
https://en.m.wikipedia.org/wiki/Hipster_PDA