My motivation is continually hearing my EFL/EFL students answer the question "How are you?" in exactly the same way, regardless of their true feelings - "I'm fine thank you, and you?".
So, after some research and some playing around with the format, I've managed to come up with 42 other ways to answer the question. There are certainly more options, including some rather "blue" ones, but I feel this selection will provide more than enough alternatives for most situations.
I hope you will be able to try out some of the alternatives with your own students in conversation and greetings using this tool from Greg's ELL Shop.