Very easily!  Choose a tray (it could be as large as the top of your ottoman or smaller - but don't try to go any smaller than half the size, or it will look cluttered and out of proportion) that has clean, angular lines or a small curve to the sides. This style of the tray is best to define the space of the ottoman and the space of the tray with its contents.  Believe it or not, the smaller the tray, the less the ottoman looks neat. Because of the texture given by the tufting, a tray can look like a small gull on a large swath of sea- like a trinket. Half the length of the ottoman is the general rule. Using throws- another quick detour to depth and texture. Layering is a wonderful way to make an elegant statement while adding, you guessed it, depth! Pick up a color in the ottoman's pattern and get a vase in that color, or put some decorative objects like shells or beads in a glass bowl.  Art that has the ottoman's shade in it will do nicely as well.