The biggest issue I was having was holding steady. The sight picture kept bobbing around and I couldn't quite lock it down.
If you find the answer, let the rest of us in on it.
Everyone has that; the question is how large a zone within which your sight picture will "bob around" should you accept.
There is lots of fine specific advice here, but let me also suggest books and instruction manuals as well. The best thing these did for me was the confidence to work on technique rather than chasing an immediate result from shot to shot.
If you improve on a solid technique and print four inch groups all day, I would consider the time well spent.