Do you have access to a roundpen? I find that a good place to work on horses that "run through bits" because they have nowhere to run and you can do some concentrated training. That's what I would do first of all.
Honestly, I hate groundwork, about the only time I do it is when I lunge.
However, when I lead/tie/saddle horses they better be respectful and do what I want. When a horse walks too fast/into me, I'll either flick my elbow or make them back 1,000,000,000 steps until they never want to run forward again. :) I'm not mean, just persistant and every day they get better. So, I guess that is groundwork, I just don't have whole lessons of it!
Every great dream begins with a dreamer. Always remember, you have within you the strength, the patience, and the passion to reach for the stars to change the world. ~Harriet Tubman