Something that has worked well for me is just practicing the trigger pull. When the weather is bad outside and I don't have anything better to do, I make out a target and practice my form on the trigger pull. If your not comfortable dry-firing your rifle, use snap caps. When I first started, I noticed I was jerking high and to the right. My arm moved a little instead of just my finger. I just kept working on trying to keep my crosshairs on target. Now I don't seem to be having any problems.