Nope, but I probably should as it'd make blogging about it when I get home easier.

I really don't know what i'd do w/o my journals that I have written while traveling/living in different countries. It's like the best souvenir; you really couldn't ask for anything better. You experience and see so much in usually a short amount of time that it's easy to forget. I try to draw pictures, take stickers, signs, etc. and put in in my journals as well. Sometimes I pull them out and read about what happened a year ago... helps me remember; in a way I see how I've grown and what i've learned since then. Everyone should definitely do it. I have never had motivation to write a journal on a regular basis but it's a good idea to force yourself too at first then you kinda get really into it. 

Yep, I have a Moleskine notebook that I use for the purpose.  The pocket in the back is very handy for saving brochures and dried aspen leaves and stuff.

My mom always kept travel diaries when we went on vacations as a kid, though she didn't write in a journal at any other time of year.  So I grew up thinking it was just The Thing to Do on trips.

Yes, I do.  I keep it for trips that are farther away or more significant in a personal growth sense.