Older gents, whether you're living happy lives or are feeling lonely or anywhere in between, care to share pro tips with the rest of us?

I'm almost 45 and I find myself thinking a lot about how my 50s and beyond will look like and what I can do now to set up myself for happier golden years (if I ever get there).

So, it'd be great if those of you further along the path could share some of your wisdom and lessons learned with us - what worked well, anything you'd change if you could, etc.

All helpful advice welcome - not just for me, but also for younger guys or your fellow older guys who may be struggling.