I have tried scribbling on a CE and carry a laptop with me pretty much constantly, but there is still something about a piece of paper that makes jotting down ideas much easier.

I go through a few notebooks a year usually. They are crammed with thoughts, code snippets, and other stuff I have drawn or glued into them.

My current notebook is hardbound book I picked on one day at a bookstore in the bargain rack....500 sheets of 7"x9" archival paper with lines. It looks like a nice hardback book with a foax leather binding. Oh, and of course it has a nice #!/usr/bin/perl sticker on the front. ;-)

My pen of choice is the fine point sharpy...loads of colors to choose from and they will write on anything.