Have some reading time? Here’s a great and thorough look at the four quadrants of training (positive reinforcement, negative reinforcement, positive punishment, negative punishment) written by Katie Bartlett, an equine clicker trainer. Many of her examples deal with horses, but the theory and philosophy applies to much more than just horses.
The article can be found here.
If you’re new to clicker training and operant conditioning, you might want to start with this shorter article I wrote recently discussing the differences between positive and negative reinforcement.