Here is a link to a friendly and helpful website with information on training your dog and training aids.

http://www.pawsability.co.uk/shop/dogtrainingaids.htm

We particularly like the Easy Walk Harness from this company. It will prevent your dog from pulling on the lead like no other training harness or collar. This one really does work, providing you get the correct fit. Your dog will only pull you the once when you fit this harness. It spins them around to face you and they don't like that happening. After using the Easy Walk front clip harness for a while you will find that your dog has better manners on a regular harness or collar.

Anna Patfield at Pawsability has also produced a very useful book, which can be found by using this link: http://thegooddogdiet.com/about/