Not sure about anyone else, but when I was diagnosed some 17 years ago, aged 30 years, I decided that I would do everything to ensure I continued to have a long and happy life - for me that means managing my diabetes carefully, bu not obsessively, working hard at whatever work I can get, continuing to study at high level, having lots of fun, which for me, involves doing things some people, even without diabetes, would regard as extreme, such as padding Caledonian Canal; competing in and marshalling at adventure races, mountain marathons, trail runs etc; leading expeditions to Costa Rica, Chile, Falklands and South Georgia; lots of independent travel all over Europe, Latin America, Morocco, Jordan etc, some solo, some with partner or friends or family etc.
I'm sure that if I stressed about things, that would shorten my life more. Currently on a morning off, and a bit upset about something, so catching up with emails to friends, and eating a bit of chocolate (with bolus) with a mug of tea, with cat draped round my neck.