Notes as Bookmark
kengo has a pretty good idea in his Flickr. While reading Getting things done, he keeps a piece of paper which he can write notes and also use that as a bookmark. You will need to have a smaller size of paper to able to do that.

Bookmark in a book – [kengo's Flickr]



Comments
Sacha Chua says on June 15th, 2005 at 12:13 pm
I prefer using Post-it notes. I keep 2 stacks of 10 Post-it notes in my Hipster PDA. Nice, bright yellow–great for writing down quick notes or using as bookmarks, and they won’t fall out just in case you open the book the wrong way.