Exercising generally only gets harder.

Maintenance is easier than building things up; start early.

In my twenties I hated spending money on health-related stuff like dentist appointments new glasses and gym memberships. I wanted to blow it all on fun stuff. Now? I don't hesitate to plop down my amex if I think what I'm spending money on will make me physically better

If you suspect you might have an undiagnosed chronic health problem, assume you do indeed, and make getting to the bottom of it Lifetime Project #1.

Can't stress this enough.

I just want to add before taking meds or any supplements make sure you research things on your to understand the risks. Sometimes even doctors are not aware of adverse reactions.

Your health should always come first before work. Try to exercise a few times a week, going for walk/runs or bike.

Having screwed this up in my 30s and spent the first half of my 40s doing a desperate low budget TV montage, I agree with this entirely. Some things you can't undo and I regret that. Learn from my mistake :)