Had a bit of spare time today so had a go teaching one of our doggy day care dogs the clicker for the first time. She was really good!
The +ve stuff is obviously the clicker and food but note the contact points and time outs are examples of -ve reinforcement being used in combination with +ve in a way that isn't stressful for the dog.
It visually explains what I was trying to say in that 'Old School Training' thread.