Daniel,
I think a key statement you've made is "while it's still fresh". For me, I get ideas all the time, none the least is immediate;ly following a class. When think about how it went and could have been done to make it better the next go around., that's what what I want to record because I'm sure to forget at least half of what I thought was imp[ortnat. A journal is a perfect place to record these kind of comments.
Barry Westling