ADHD builder's brew. (Steep english breakfast tea bag for 5-10 mins to draw out as much tannin as possible and stain the mug forever), no sugar, splash of milk so it's a nice deep terracotta brown. Take 2-4 sips and forget about it is bitter and cold. Microwave it back to scalding. Rinse and repeat until you admit defeat and tip away the last 1/3 of your tea at 5pm that day.