I remember there was a point when I was younger that I stopped asking for toys for Christmas each year and I started asking for tools. Those were physical tools of course that I still use today, but that memory just sticks in my mind as I read your post. As for skills that could be considered tools, I've picked up so many of those in my years working on and with computers. I am probably one of those people who has forgotten more about computers than most people know!
That's the thing with picking up skills throughout life, we acquire and use them and acquir more which sometimes render those others redundant. I enjoy rediscovering skills and attributes I've not used for a while and applying them again; it's rewarding.