Like a lot of people have said, more lessons.
I like Juile Goodnight and CHA, that being said, I am not a big fan of the "pulley Rein". I haven't had many horses run away with me because I don't let them get started. One thing you need to understand about horses is that they are really made to pull. They are very powerful when they are in a pulling position meaning when they are in a line, nose, withers, hips. If your horse is running away with you most likely they are in a strait line nose, withers, hips this is when they are the most powerful. If you can break that line you have a better chance of regaining control. This is where pulling the head around helps, I myself like the pushing the hips out of line with the body better but that is a little more advanced for you and the horse, pulling the hear around can work too. If you horse is moving forward and you are feeling like you are lossing control you need to quickly and firmly reassert yourself into your horses mind. A quick jerk on a rein to get your horse to move out of the line it is traveling in can go a long ways toward regainning control.
But really, lessons are your best bet to help you.