I've been riding for about 3 months now and i am really enjoying it but i was looking for some tips. How can i keep the ball of my foot on the stirrup??? It often slips so that its down in the middle of my foot. I try to keep my heels down but it still slips. I also have trouble with the canter, particularly getting to horse to do it because i find it hard to kick while trotting. Anything i could try? I know it takes practice and a lot of it.