Weigh out 18-19 grams of coffee.
You'll need about 250ml water, so put at least 300ml of water on to boil so you don't run out.
Put your filter paper inside the dripper - most people also fold the seam over on itself, and Wet the inside of the filter with hot water.
Pour your ground coffee in to the filter + dripper, then pour a little water over to start the process.
Wait 20 to 30 seconds and then continue to slowly pour the water over the grounds in the dripper.
Try to pour in to the middle and then draw an outward spiral with the water to get all the coffee extracting. Avoid pouring too much straight on to the filter paper directly.
If you're using scales, stop pouring water just before the scale reads 280g (assuming your cup, dripper and coffee are directly on the scales!)