SAMPLING RING
Sampling colors in Photoshop isn't a new concept but there is a great new addition when sampling colors. When you select the eyedropper tool, choose a sample size and then click in the canvas area to sample a color. When you click you will notice a sample ring appear around the cursor. The top half represents the color being sampled and the bottom half represents the existing foreground color. Provides a great visual aid when color matching is critical.