If you’re in your 30s, longevity may be low on your priority list. You’re also young enough not to get wrapped up in your own mortality. “You still have a lot of innate resilience,” Eve Henry, MD, internist and chief medical officer at integrated health platform Hundred Health, tells SELF. It’s the reason doctors have stressed focusing on health at a young age since well before longevity got buzzy. Below, experts share the behaviors to invest in during your 30s for the biggest return down the line.