I think having a child started it; so little time that I had to be more efficient with what I had. It's worked very very well. All these things I've wanted to do but never actually done are now happening. I've actually become incredibly ruthless with my time. Everything must have a purpose toward furthering a priority and be a conscious decision.
Of course this doesn't mean I don't do anything for fun or relaxation. My emotional and spiritual well-being are high on my list of priorities after all. But now I'm much more likely to sit and play the piano than blob out with google.