I know for me, getting out of my comfort zone was a big step in my healing process. I took a trip to Italy on my own and ended up meeting some amazing new friends. I said "yes" to any fun opportunity that came my way, any extra work that was handed to me, and every new, crazy gym class that was offered.
Those experiences sustained me through some dark times. And they kept me fulfiled until the next new experience. Until I realised that I was actually having fun, too. I plan on staying uncomfortable for awhile.