Any training in which the dog is successful and able to understand what is expected of it - and learn/please it's owner is confidence building.
Many people give up or think a method has failed because they've misused it or have done it incorrectly.
In our ACO training class we were actually given a bowl of hershey kisses. Another person decided what "behavior" they'd like to see the other person do. They then clicked and rewarded (hershey kisses) when the other party got it right.
For instance. Touch your ear. So the other person would start moving around and if a hand got close to the ear, a click/reward. Through that, the other person was supposed to figure out where the hand was supposed to go. The success of the other person learning where that hand was supposed to go was directly related to the speed and accuracy of the person clicking and rewarding.
If you think about it...the perfect training system (without a click) is a sink where the water is motion activated.
You stick your hand there. Nothing happens. You start moving your hand around, and boom! There's water! Reward! So we try to recreate the situation to get more water.
Same exact thing. We're moving our hands around trying to get the water to start and actually stay going! We catch on very quickly, don't we?
Same with dogs. They are rewarded for doing the right thing (the thing we're teaching them) and doing the wrong thing gets ignored. The click marks where they are starting to "get warm" and then when they are "hot", jackpot!!
Cod, are you just bored today...??