I did a quick search to see if anyone had mentioned using journal for this purpose. Didn't see anything so I thought I'd pass it along. Hope you'll forgive me if I'm preaching to the choir.

I love to watch documentaries and educational films (the geekier the better) oftentimes taking notes while watching. I found that if I lay the e-reader side on my lap and open a new journal selecting the page format for blank I can watch the video and scribble my notes in landscape mode advancing pages as needed. Works rather well. Funny that my handwriting improves if I'm not watching what I'm writing.