One of the most important and beneficial trainings I ever underwent as a young writer was trying to script a comic. I had to cut down all of my dialogue to fit into speech bubbles. I was staring closely at each sentence and striking out any word I could.
The brim of the bookshelves' hat. You see, wizard bookshelves have hats formed like fedoras < ... insert 6,000 words of impromptu worldbuilding here ... >