Sharpie Sketches - Horses by ColossalBeltloop . I once heard an artist say that she liked to draw in pen because there was no erasing, and it helped her learn to accept imperfections. That seems like a good (albeit somewhat painful ) idea!
EXERCISE 3 With this exercise ensure your horse is absolutely straight on the straight lines in the middle (marked darker in the picture) and that your horse is not leaning on the inner shoulder. Ride this on both leads in walk and trot.