I'm always looking to improve my shooting. Since I aim "Split Vision", it was critical I that I worked hard when I had to shoot LH due to my shoulder surgery.
Now that I bowhunt both ways, I just spent this past month shooting 7 yds in my shop at the large pillow bag. I'm a big advocate of John Schulz's "Upon release both hands do nothing." No pulling the hand away from my face, no torquing the bow.
Putting a 3" wide blaze orange marker in the center of the bag for my "kill zone", I'll shoot 30 arrows RH in the morning, 30 arrows LH in the afternoon. Every shot...make sure my anchor is solid, aim correctly...smooth release with "both hands doing nothing".
I'm still working on improving the Hill swing draw method with my Kempf Longbow. Through hard work, I've eliminated my right eye occasionally taking over when shooting my LH Fedora recurve. Working hard on your form and learning to block out all outside interference(Concentration) will definitely make you a better shot.