The four-and-a-half-minute habit.
In my family, we made tea the proper way. In a teapot. For five of us. It was a sacred duty — or at least that's what I, as the youngest, was repeatedly told.
At some point I started timing how long I left it to brew, eventually settling on 4 minutes 30 seconds as the perfect brew time. (It still is.) My methods were doubted at first — but soon the compliments started pouring in.
Now, a couple of decades later, I've made an app for it. So not only is my tea brewed to perfection, I can get ripped at the same time. Or at least offset the couple of custard creams I'm about to devour.
“If you're one of those people who waves their teabag at the hot water — you will remain as weak as your tea.”