You have bad posture
Future you really doesn’t appreciate the hunchback you’re giving him right now. Eight hours a day slouched at your computer makes a mess of your spine, which seriously messes up everything else. Recent studies have shown that any prolonged stationary position (even standing) is terrible, so straighten up and sneak in some office workouts whenever you can.
You don’t keep an emergency fund
Nobody plans to get kidney stones, but if you had to pay nearly $4,000 to piss a rock today, would it break the bank? If the answer is, “What’s a bank?” make sure you’re not setting 40-year-old you up for disaster.
You don’t pay attention to your skin
Forty-year-old you would like to thank you for turning him into a leather purse. Tan lines might be hot now, but not so much when they get you a case of America’s most common cancer, and sagging wrinkles to boot. Most experts recommend wearing sunscreen every day, but since that’s probably not going to happen, at least toss the tanning oil.