Over-excitable people like myself are clearly responsible for many of the ills of the world, including road rage, traffic accidents, litter and World Wars, as well as waste.
As a measure designed to both help these people, and to help all others indeed, I propose tortoise guide-dogs.
it is the term 'dog' that is slightly misleading here, as a tortoise is not strictly a dog, genetically speaking, but the principle is sound.
A tortoise guide-dog would teach the art of calmness to an over-excitable person in a very short time, and would be relatively robust in the face of over-excitedness.
This idea is, I believe, the inspiration behind Aesop's fabled fable concerning the tortoise guide-dog and the hare, although I pre-empted him somewhat with this idea.
Aesop himself was over-excitable.