This, from "Practical Kabbalah" by Rabbi Laibl Wolf.
"A younger evolving Hassid is taught that all the theory in the world is of no use without avoido. Literally, this means "work." The work consists of changing oneself...Avoido is the means by which the student trains the Mind and Emotion flows and behaviors to embody the attributes that the master demonstrates in his life."
Pretty much "The Great Work, "no?
And, it is pronounced, Ah Vo Ee Doh, not Avoid-oh!