No I don't, I do think it's definitely mindset. I'm also 40 and have just watched three people die we love, one after the other, in a short space of time. It's really given me the perspective to appreciate what I do have and the people in my life and make the most of it. My mum died at 65, which is only 25 years away, so I don't want to waste a minute hoping for more, as who knows when it will all be over.
I can't be bothered to work really but I've reframed it in my mind that without it, I'd not be able to live the life I do and have the house we do. Even things like running my son back and forward to his sport and games, it's exhausting but how much we chat and bond is worth it. I hope one day when I'm no longer here, he will appreciate that time we had together.
The last three years were pretty crap for us, this year I've filled it with fun things I wanted to do - going to see a comedian I love, festival, holidays and concerts.
Realistically you're never going to do all the fun things in the world, but you could sit and write a bucket list of the things you really want to do and do one as often as you have the time and finances.
Outsource the tedious things if you have the finances, get a cleaner if you can. Make sure others in the house are pulling their weight if they are old enough. If your children are only young then you will have more freedom as they are older. I've now got two teens and an adult who are all more independant and it's given us more time and freedom too.
Edited for using the wrong your.