Proper placement of product shots on a sales sheet, also instructions to add a drop shadow(lightly) to elevate the product.
Extended product photo selection
Images can be turned to black and white where necessary to help the primary message pop off the screen/page. Altar image to b/w and add 10-20% noise.
Color photographs can be used sparingly to showcase actual or true to life images that are relevant to the message.
Color overlays can be used on top of black and white images. Make sure to drop the color so that the typography or message which should sit on top of this style of photography can pop.