Drink more water.
https://www.businessinsider.com/drinking-diet-soda-could-be-linked-with-serious-health-issues-2018-5
https://www.aarp.org/health/healthy-living/info-2017/diet-soda-high-risk-dementia-stroke.html
UPSIDE: lower colon cancer rates among diet cola drinkers, so there's that!