Djinn
and Tonic
I heard about the ice arrow trick for Bongo Bongo long before I got the game so I did go out of my way to get all the arrow extensions early on. Plus I played WW before OoT so I knew about ice arrows in general before playing the game as well. I thought they were actually useful for the game in OoT. I did not know they were very pointless and could easily be skipped.