Com·mon·place, n.
 1. An idea or expression wanting originality or interest; a trite or customary remark; a platitude.
 2. A memorandum; something to be frequently consulted or referred to.
    Whatever, in my reading, occurs concerning this our fellow creature, I do never fail to set it down by way of commonplace.   --Swift.
 Commonplace book, a book in which records are made of things to be remembered.


 commonplace book
      n : a notebook in which you enter memorabilia