When away from a keyboard, I carry a notebook and a pen. Both have varied over the years, as I was reminded while doing some cleaning in my study. (A dozen old, dry Pilot razor tip pens finally got tossed.)
My current favorite notebooks are Japanese B5 format student notebooks from "Campus". Great paper, a good size. Smaller than 8.5x11 and A4, but larger than the mid-sized wire-bound books available in the U.S.
My current favorite pen is the Zebra "SARASA", which come in 0.7, 0.5, and (my favorite) 0.4mm, in a number of colors of Gel ink.. (The blue/black is great for scribbling Perl, and the dark red works well for editing someone else's code. It's a good simulation of blood.) They write very smoothly. Friends I've lent them to invariably say "Nice Pen. Where'd you get it?" I get the notebooks and pens in a local Japanese stationary store (across from Standford University).
What are your favorites? What notebooks and pens would you recommend to friends and coworkers?