What NOT to do while posting

I mentioned yesterday that I wasn't entirely happy with my posting practice.

On one hand, my horseback riding lesson on Wednesday really helped me with my rhythm — I've got the posting rhythm more or less down for Panama's quick little pony trot, and I don't feel like I'm in danger of falling off anymore.

On the other hand, though, I've developed a bad habit of sitting too far back on the saddle when I sit. If it weren't for that, this picture would be almost perfect:



Here's a closer look:



My butt shouldn't be so far up on the back edge. I'll have to practice posting the trot some more, so that I can correct this habit before it gets too ingrained.