I retired from my first career early and set up a small Computer Services company that I operated for ten years which were possibly the best of my life so far. I retired the second time in 2007, sold the house and moved into an RV. I'm in Canada from May to Oct and in Texas for the winter where I belong to two clubs and shoot almost every week. There are two of us 71 year old guys in one club. The other guy learned to shoot when he was 18 months old and finishes in the top three all the time. I want to be like him when I grow up. My latest adventures involved rebuilding a new Tanfoglio with all premium parts. That's my 3 Gun 9mm that I also use in Steel Challenge. When I get back to Canada I'm going to buy a S.A.M. 1911 and do my first 1911 DIY trigger job. I can't keep up with a lot of the cool kids but they are 30-40 years younger. I do have nicer guns tho.
By the way, a major part of my services in that little company involved tutoring "mature" people. My eldest victim was 92 and I had many that were over 80. Watch out for us "mature" people as while we move slower, we can be deadly accurate.