What’s the simplest habit that has made the biggest impact on your life?

Sometimes, the smallest changes lead to the biggest improvements. A simple habit—whether it’s waking up earlier, drinking more water, journaling, or limiting social media—can completely change the way you feel and function.

For those who have made small but meaningful changes in their daily routine, what’s the one habit that has had the biggest impact on your life? How did you start, and what difference has it made?