Great way to work with faces/portraits: rotate them, x's over mouth, eyes, etc. Also--visually cutting off the top of the head and having something coming out (can be a reference to something creative, or just an aesthetic element).
Water Splash Photoshop Brushes via You The Designer. These are creative and unique in their own way. The fact that they are made from water is creative and interesting. These would be great logos for a water co.