Unless afflicted by writer’s block, authors have no trouble getting words down on paper or screen. However, some have more trouble than others getting those words in the proper order. Periodically study your sentences for correct structure. Especially make sure prepositional phrases are where they make the most sense. If misplaced, they can have hilarious implications that will commit the serious faux pas of throwing your reader out of the story. Place them as close as possible to what they modify for maximum clarity.