I just started lessons again yesterday after the holidays, and decided that this year my goal will be to perfect my position. There are several things I'm working on, but what gives me the most trouble is keeping my heels down and my leg back.
I can kep my heel down OR my leg back, but it seems that when I have my heel down my leg movs forward and when I move my leg back my heels come up. I'm riding leeson horses, so I can't change anything about the tack or anything (sometime I have the feeling that the stirrpus are quite far towards the front of the saddle on this particular horse).
I have tried thinking toes up instead, but that just causes me to loose my stirrups :p I'm going to work on legstrength and lengthening my calves, but in the meantime I was wondering if anyone has any tips/other ways to think about it, that might help me get it right.