an enso represents a journey. Buddhist monks draw these with brushes in journals; an open enso signifies an ongoing journey. In Zen Buddhist painting, ensō symbolizes a moment when the mind is free to simply let the body/spirit create.
Arrow wrist or arm tattoo? An arrow can only be shot by pulling it backward. So when life is dragging you back with difficulties, it means that its going to launch you into something great. So just focus, and keep aiming.