Gave up having one to two alcoholic drinks per day. Was trying to do that primarily because studies have definitively shown it's better for one's health.

So I tried. My mind felt dulled but I soldiered on. Finally gave up because I was getting some insomnia. I'd much rather die 20 years younger then have insomnia. Really the mind dulling was getting bad enough on it's own. I figured I'd develop a tolerance and manage to think through the fog, but it didn't seem to be happening.