I wanted to have a place where my students could share book that they really enjoyed. I know that a lot of my favorite books are ones that were recommended to me by others.
So I created a Book Recommendation Bulletin Board. I print the recommendation forms on colored paper and cut them out. Whenever students read something they love, they fill out a recommendation form and add it to the bulletin board.
Just to encourage recommendations, I added that I will have a quarterly drawing and students will have an entry to win a small prize for each book they recommend. You don't have to do that part, but it seems to get some of my more reluctant readers to share book ideas.