This year I reduced my caff from avg 160mg/day(rockstar) to 50mg(caffeinated sparkling water) and also limit to 3days a week(tues-thur). I get the same effect from the reduced mg because of the reduction in frequency. This change is having a profound impact on my anxiety, irritation, and overall contentment. I am far less reactive and much more zenlike. Productivity has increased because I feel like I get a boost on the caff days, rather than feeding a dependency, and I structure my work accordingly.