Notes from the cup.

Decode origin, varietal, process, elevation, and roast date on any specialty bag. The warning signs to spot, the six varietals you'll actually see, and the "golden window" for freshness.

The ten mistakes every home brewer makes — storage, grinding, water, preheating, drinking too hot. A decade of mess-ups, so you don't have to make them.

Dose, grind, yield, time — and how to change one variable at a time so you actually know which one made the difference.

Seven apps tested over three months, with the good, the bad, and the "why did anyone build this" — plus the one we built ourselves.

Lunar, Pearl, or Pyxis. What the buttons do, which mode to use for espresso, how to pair with an app, and what the pour curve is actually telling you.

Degassing, peak windows, storage, the freezer question. When a bag is best, when it's past it, and what you can do about it.

Clicks, numbers, rotations. Why every grinder is different, how to calibrate yours, and the fastest way to land on a working setting for any coffee.

The physics behind the shot — why longer isn't always stronger, what extraction yield actually means, and how to taste the numbers.

The Hario V60 demystified. A working recipe for any roast level, the five variables to control, and why your pour technique matters more than the paper.