Think about the book you are reading at the moment. What would you change in it? This is the same process when you are writing. What would you change in your writing to add more impact - to grab the reader's attention and create that vivid image in their heads?
Remember to add the title - copied correctly from the book. (No excuses for this being incorrect if you have the book in front of you. If you don't have the book there, then Google the title to get it correct)
If you wouldn't change a thing in the book you're reading, then write about why you wouldn't. What makes that book work so well for you? What has the author done to achieve this?