I have friends way more experienced than I in horses. One of them introduced me to an instructor when we were both over on the far side of our state. I took one lesson with him on my friend's very well trained in dressage TB and felt like I learned more in fifty minutes than I have in the past eighteen months of lessons! Has anyone else had that experience?
If it didn't cost me a ton of gas money and ten hours of driving, I'd definitely be taking more lessons with him, as is, I'll try to schedule them whenever I'm over visiting in that area. He was direct, told me what, why and how to fix things, and didn't let me get away with doing anything incorrectly. He pointed out tendencies I have that I hadn't noticed. He gave me a TON of stuff to work on, which for me is very exciting. He also gave me a huge confidence boost, unintentionally I'm sure, when he told me there was nothing grossly wrong with my riding and started me working on the smaller things to make me better. Unfortunately I live in the middle of nowhere where all anyone does is trail ride their western ponies, so finding a good dressage teacher around here just isn't going to happen. I'm working on my own several times a week, with lessons from people who are way too nice and let me get away with things ;).
One of the changes included rotating my leg a little differently from the thigh, and Wow! Does it make a difference. It also worked muscles in a new way and the muscles on the outsides of my hips felt all sorts of used afterwards. What ARE those muscles? I've never felt them before.