For most documents internal to the organization, standard bullet points will suffice. However, for customer-facing documents, advertising material and newsletters, you might want a little more pizazz.
With your bulleted list selected, click on the Bullets dropdown button in the Paragraph group, Home tab, and select Define New Bullet. On the dialog box that appears, click the picture button. You can choose either something you’ve created yourself, or search for an image. Images will be sized to match the text. If you choose something from the Web, it may be copyrighted. Be sure you can use it, legally.