This spreadsheet helps students (teachers, parents, anyone) keep track of the books they've read based on genres. I've used a color fill based on genrefication used in my school and classroom libraries.
Type in the title of completed books under the genre and fill in the color. At the end of the year, you'll see your favorites and those genres you avoid. The ending bar chart is a great visual. I encourage my students to read at least one book from each genre during the year.