Method 1 - Go into the camera settings and find the Picture Control setting and change it to MC - Monocrhome.
Find a location with interesting patterns and shadows to capture a black and white photo with interesting shapes and contrasts.
Method 2 - Take photos on regular camera settings in a location with interesting shadows and lighting.
Save your photos and load them into Photoshop. Open the adjustment settings and select "Adjustments" "Black and White" from the "Image" menu.
