For me it was dedicated time in nature getting back into my body ... trail running in particular. I'm prone to intellectualize everything, including my emotions. The mind is a wonderful thing and I've found that to depend on it for everything is pretty limiting.
This all started when I had more time to myself again after my kiddo began school 5-6 years ago (I'm 40, now). I found yoga early in this period and began to learn how to feel into my body more than ever. To feel my emotions rather than think about them, and let them pass. Also, I began to listen to and trust my intuition even for the seemingly smallest of decisions.
It seems that getting to know oneself deeply is a daily practice. At least it is for me.
edit: One more thing: journaling. By hand. 3 pages (30-45 minutes non-stop). First thing in the morning, every morning as described in "The Artist's Way." This helped get the sh*t out on paper before bringing it into the world. Whatever happened to be on my mind ... even the mindless drivel.
