#1. put camera on tripod #2. Use the widest fasted lens you have (ie. 24/2.8 etc) #3. Point to something like a brickwall etc #4. Using the viewfinder, move the focus to the desired test focus point #5. Change to Live view, the focus point will be the same #6. Take photo using live view using live view auto focus #7. Change to view finder, focus on same spot (should be there already) using view finder auto focus, take photo #8. compare the two photos. Should be mostly the same. Viola! #9. Repeat for other focus points.
I did this very thing with all 51 points to show Nikon that I did indeed mess up my Nikon when i dropped it.