At nearly every shrine in Japan are places for people to put their personal wishes. I think this tradition is really cool versus silent prayer. I think when you have to write something down and display it, it kind of makes wish making more real. It's like when you write down your new year's resolution every year instead of just saying it in your head. Maybe that is just me but I've always failed on my resolutions that I think to myself versus the ones I've posted above my desk.
While we were at Nikko, Masumi and Kensuke pointed out a wish that was hanging up. This wish, if you can't tell from the picture, was done by a little boy who wants to be a major league baseball player: