Regular exercise, especially hiking.

I have an app that asks me how my day was, I have like 7 years of data based on a scale of 1-5. It colors it from a gradient of red to green and gives a relative emoji from happy to sad.

For 3 years, I challenged myself to go on a nearby hike once a day for a whole month. It's not huge. Like 2 miles out and back, about 800ft vertical gain.

I can see so fucking clearly the three best months of the those entire 3 years were the one month of each year that I hiked nearly every day.

Talking like 2.7-3.1 avg vs 4.3-4.7avg. frown literally upside down.

Now I try to go on hikes like once a week.