Turning 50 five years ago seemed like a big deal at the time. When I wrote the post Fifty is Just a Number Isn't It?  in July 2010 I was musing on the minefield that the fifties looked like to me, and the challenges of aging, without having a clue what was actually going to happen and what it was going to feel like. Now, turning 55, navigating my way through the minefield, I find myself wondering if I am halfway there - and if so halfway to what? Maybe [...]