I was answering this earlier but had to leave.

See if your library has dog training videos { it's easier to see how the pro does it on the video and copy it}
they have been the most helpful for me..
ie:train the dog to not pull

Uncle Matty's woof videos are real simple - watch it over a few times and then practice, then watch the video again then practice etc - and you'll understand more of it each time.
I've tried his techniques on ours & other family members' dogs and it worked, but family didn't get the tape to fully understand it so it didn't last. You have to maintain the training and not let things slide backwards.

you have to be the alpha dog, not in a mean way but mentally & with confidence.

here's the video titles -be sure to check your library for them-
http://www.unclematty.com/store/thumbnail.asp?cid=7