Here's another thing I learned when I started carrying around a sketchbook with me. People like to see what you're finding so interesting that you want to draw it. I've been journaling for a long time - there would be curiousity about that, too, but then folks would be disappointed when they saw there were no pictures on my pages. Once I started adding little drawings, I'd find that others would be inspired - "Oh, I should do something like that, too." The fact that my drawings are less than professional might actually give them more license to give it a go.
One of the sweetest instances of this happened when one of our grandsons was staying with us for a while. He was six. One evening he was eating before he left to go to a t-ball practice. I sat at the table with him to keep him company and he also set up his stuffed animal friends around him. I decided to sketch him. He loved the picture and the attention.
The next evening as I was preparing dinner, he said "Don't look!" and I stayed in the kitchen until he told me I could come out. When he did call me, he proudly showed me his drawing. I was blown away by it. He had captured so many elements around him - the cabinet behind him with the stemmed glasses and little figurines, the vase of spring flowers, the lamp, the spiral bound sketchbook on the table. He'd spent over half an hour laboring with the details. I had the feeling that he was claiming the space as his own - a place where he felt at home. He continues to love to draw, to illustrate the stories that come from his imagination.
What is your experience with sketching or journaling? Have you done any illustrated journaling? - I know a number of people who love to keep this kind of record of their trips, in particular.