I tried taking the best as i could LOL at 10 months its hard to get him to hold still long enough for the camera to take pics.
Try tying him to something, so that you can get a good 8 feet away from him. Then throw a ball, so he stands alert, and get a side view of him standing with all four feet on the ground.
It's easier with two people, then one person can sort of stack him and the other can take the photo.
The other thing you can do is just hang out in the yard with your camera acting casual. You just might catch him stacking nicely all by himself. I have gotten some of the best stacked photos of my pup this way!