To crop a photograph, select the image and go to Picture Tools>Crop. Using the crop tool, click on one of the anchors on the photograph and crop it to focus on the part of the image you need. PowerPoint 2010 has cool new options in the Crop tool – Cropping Photos to a particular shape can be done with just one click.
A diagram that lends itself to combining well with photographs is 24point0’s Circular Diagrams. You can insert a picture of the company headquarters, a product or a group of employees in the center to enliven the graphic.