Mike,
I carry a folder of A4 sheets, with personally garnered, not "date-dependent" notes, a bit like Charlie Brown and his blanket!
The contents are whatever stuff I need to access quickly (from pushback to TOC, and TOD to the gate), with the deciding factor being that not knowing it could land me in the Chief Pilots office.
Regarding aviation, I am a believer that "Knowledge is not knowing something, but knowing where to find it". (with credit to Samuel Johnson?)
