I concur with the others re: physical activity. Exhaustion (well, or just healthy levels of "tired" at the end of the day) and "busy" seem to have worked wonders for my DD's ability to "just do it" with tasks that previously would have led her to hit start on the perfectionism spin-cycle.
She no longer has TIME to spend two hours on a fifteen minute assignment.
I'd recommend, though, that parents take into account the innate temperment of their child before signing up for team sports. That kind of intense interpersonal environment could be an additional
stressor for a highly introverted/awkward child. You don't want it to be a source of anxiety.
My DD14 runs each morning with her dog-- this time of year, the two of them see a lot of sunrises together.
