I stick things in books. always have. letters. reviews. tickets.
in my current springcleaning spree I've been airing some of my hundreds of books. flipping thru one yesterday I found a tiny dateless yellowing clipping from perhaps the Plain Dealer.
it's a brief story from the Associatd Press:
"Oysters change their sex. Most oysters from America's East Coast water start life as males, but enough later become females to maintain an even balance. English oysters change back and forth during their lifetime, the National Geographic says."
I've been known to appropriate such news items in whatever I was working on at the time. I don't recall ever using this material but it certainly is usable.