As LadyBestMareYaNar said, do lots of circles, serpentines, half halts. Practice transitions down if she becomes excitable and as soon as she starts 'messing around', whether it be rushing on or putting her shoulder out, bring her on a smallish circle and make her work through her silliness. Half halting is good, but try and half halt with your seat and not so much with your hands, though feel free to use your hands if she wont listen to your legs. When i say use your seat I mean squeeze, quite firmly with your knees, this restircts the horses movement behind their shoulder, and often they slow down because they can't create as much power in front.
If your is rushing on in trot she will most probably be on her forehand, so work on making her round her back and bring her hind legs underneath her and get her working from behind - because a rider has more control over the hind quaters than the front quaters. Dont attempt canter until you are happy with the trot, even if you go a whole session without a canter. If you want to canter, go out with a friend on a hack and put your mare behind their horse and show her that it is much more comfortable to have a steady trot than a rushed one. Then when you canter, for controls sake, keep a nice short rein with a definite contact and stay behind your parter. If you feel happy about cantering up front on a hack feel free to... this is just advice. :)
Hope this helps, msg me how you get on =]
P.s Bridging your reins may help with control of the strength of the canter
Good Luck :)
11 January 2009 10:37