I remember those articles Jo - they were by Sheila Bailey of the Derbyshire Canine Centre. Very good too

Jo, i taught my dog to track for Working Trials (although i consider us still very much novices at this game

)
Here's how:
Start on a good day weatherwise - so no strong wind or hot sun. Grass is good to start - prefetably not walked on by too much else.Take a pole out with you, and a fav. toy which you can drag along the ground.
Work with the wind behind you, and stick a pole (we use electric fence poles) in the ground. Leave the dog with someone or tied to a fence nearby as you want to tease the dog with the toy.....start by the pole and put the toy on the ground, wiggle it and call dog (who is restrained) excitedly.
Run or walk backwards facing the pole, and draggin the article, for about 20 paces, then place the article (toy) on the ground and hide it if at all possible ie cover with grass.
REtrace steps, try to be excited all the time.
Collect the dog, who is preferably on a special harness, and line, and start him at the pole pointing to the gorund and say "track". He will hopefully charge ahead towards the toy, when he retrieves it HUGE game and fun

Repeat for 30 paces and then 40 paces. MOve the pole along 15 paces or so to reach fresh ground.
That's it to start - all handlers will have their own way but this worked well for our group with a variety of dogs - BSD, Dobe, Beardies, Flattie.
The thing about tracking is that ultimately it is all about articles: if your dog is mad keen to retrieve (and you can teach this) you are part way there. Dont try to instil discipline at the start, you really want that enthusiasm. My dog will reallly pull me now and that's good

I thought she was all over the place when i was training her, but kept faith in her and encouraged her enthusiasm and now i am excited about what she is doing. So dont be put off if your dog does this! Also, don't ever pull your dog off a track as a sensitive dog will be discouraged. Try to trust the dog.
As time goes by, you can track and find articles along the route (or he will after a time start steam rollering ahead to what he believes is the end of the track). When doing this you will probably start heading into the wind so that the scent of the articles or toy will rise towards the dog. Start doing "legs" which is when it becomes really interesting - i was watching an experienced triallist last week with her Lab and he was amazing.
There is so much to learn and it really is so interesting; you might also want to consider a WT style Search Square - well done you for giving your dog such an interesting life

Good luck
Lindsay
I recommend Terry Hadley's "A Tracking Manual" - hardback, £15.99 from www.k9education.co.uk and also Roy Hunter's "NOsework for Fun" which I started off with and am still learning from. Be careful about getting any of the other books as honestly i have one or two and they can confuse.