I've been trying to spend 10 or 15 minutes every time I'm at the barn doing some basic ground work with her to get her to realize that while she's bigger than me, I'm in charge. When I bring her in/out of the field she has to stop as soon as I ask, usually standing over grass, and wait until I tell her to go. We'll halt, back up, walk in circles, trot a few steps then halt etc, so she can't just charge into the barn and has to focus on what I'm telling her to do. I've also been working on getting her to move away from pressure. If I put my hand above her stifle (can't think of the name of that area...) she'll move over right away, and I can get her to circle around me now just by tapping her once and holding my hand there. She seems to be responding better, but her manners still haven't improved a ton. I would not describe her as being a "pushy" horse, but she does occasionally pull towards grass or hay in the barn still.
My question is, are there any other excercises I can try with her to make her gain more respect for me? I'm continuing to work on the above of course, but I'm running out of new ideas. Thanks!