Marie Kondo’s joy-sparking empire may very well have started because she begins her day by opening her windows to let in the fresh air. Media giant Arianna Huffington is another devotee of the morning routine—hers includes a daily meditation and a good round of exercise.

Turns out, many highly impressive people credit their success to a meaningful morning schedule. But these rituals are not just for trendsetters, influencers, and CEOs.

“In general, people tend to be at their best in the mornings,” says Laura Vanderkam, author of Off the Clock: Feel Less Busy While Getting More Done and a strong advocate of effective morning routines. “It's important to match the right activities with the right time. So, in general, I tell people that if it has to happen, it has to happen first.”