Men in their 40s, what’s one piece of advice for men in their 20s?

Back and teeth are haunting me already at 31. Take care of them, it's crucial for your quality of life!

Especially if you have an office job. Get a really good and really expensive office chair with a flexible back and adjustable arm rests so you're not sitting in the same position every time.

And also, take a walk every day. I do that every time on my break and haven't had back problems in years.