I've been focusing on improving my 25 yard accuracy the past couple of weeks. I shoot at both NRA B8 targets and my 6" steel spinner. I started working on accuracy while shooting at the 6" spinner. Instant gratification when I do my part and once I reliably work up to hitting it every shot out of 10 rounds, I'll move to working accuracy on a B8 more. This drill has helped me slow WAY down while shooting and concentrate on the fundamentals a lot more.
https://www.youtube.com/watch?v=NxyTFzgWjhk