Abe Books compiled this list of various types of ephemera that people collect along with a few key thoughts about each type. Enjoy!
AbeBooks: Book Collecting Guide – Ephemera
Ephemera is a very broad category of collecting. It is anything that is transitory and not intended to be retained or preserved. It comes from the Greek and Latin words. Epi means “on” or “for” and hemera means “day”.