Visit your tree friend often. Take a little time to get to know it. Meditate together, focusing on the exchange of breath.
A wonderful quote by Thích Nhất Hạnh provides a lovely illustration of agaya "...I looked into the tree and I saw the whole cosmos in it..." Another expresses ubuntu "We are all the leaves of one tree. We are all the waves of one sea; the time has come for all to live as one."
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This video describes some of the science supporting ubuntu. This is a talk by Tom Chi at TEDxTaipei, who never uses the term ubuntu. Nonetheless, what he describes is the underpinnings of ubuntu in physics, cosmology, chemistry, biology, and neuroscience.