How the heck do some do all that and make it look so easy??? Right now I get myself posting correctly, and then I find myself having to pause in the seat in order to correct the direction he's headed with leg pressure. I'm also having trouble keeping my hands in a quiet position while posting and trying to turn corners or stay on the rail? Any tips for a newbie?
Some things that help me on my neverending "lets figure this trotting business out" (aka delay canter as long as possible)
First off, posting isn't about enthusiastically bouncing up and down. Just lightly getting barely pushed up and settling back down is better, and it keeps your hands steadier too. So try not to go up so much. (I mean, if you're anything like me, cuz my world just about exploded when I got told that)
Also the coolest thing about posting IMO is that the horse slows down if you post slower. I don't have to chant magic words or do some weird one pull on one rein and five pulls on another, or any other hocus pocus illuminati stuff, I just go up and down slower. (or down. cuz thinking up... refer to above paragraph)
If my hands are getting spastically all over the place, I either hold on to the saddle pad for a few beats, or I'll position my pinky against it so I can have a reference point for my hand to touch and stay steady on. Or I'll take a second to glare sternly at my hands until they stop moving.
DISCLAIMER This sounds kind of complicated and this might just screw you up: Use your leg to stay on the rail. When I ride around the ring, I push my inside heel a little further down and lift my outside heel a little bit up to keep my balance right. Like... if you stand up right now and both your feet are flat, and say your left foot would be towards the inside of the ring, stand on your left heel and your right toe. Then to get him back on the rail I kind of move my inside leg a little forward and press into his side while pushing that heel down.
I know they say look up, but I spend more time looking at my horse's neck, head, mouth, checking my hands, occasionally looking up to make sure we are still going the right way...
And of course the one thing that will magically fix every single riding issue you have ... ride as much as possible!