I carry a notebook in my pocket all the time – a Pocket Squared Moleskine at the moment. The way I use it is pretty much along the lines of PigPogPDA, but mixed in with more general journaling.
Yesterday, I had an idea – mark some of the notes as I go, and copy the marked notes to a blog post later that day or the next day.
So, I’m actually writing this entry on paper, with a pen (Pelikan M600). If you’re reading it, I actually got around to typing it up and posting it on PigPog. I’ll make the title something very simple, including the date, which should help make the typing-up process something that can be done without much thought.