I prefer a book and pen--there's something about having a tangible journal--but I find that lately, as I type much faster than I can write (and get less of a cramp that way), I either don't write much in my journal (i.e. I don't deal with the stuff that needs hashing out) or I'll open up a word-processor document and type it out as it's easier to get my ideas down quickly and go back and edit. I hate doing that--both putting it on computer and not having it all in one place--and I thought of printing out the stuff I type and putting it in a notebook or binder, but then I can't justify using all that paper and ink when it's right in front of me on the computer...