Try a pourover or a French press
Coffee nerds preach pourover methods over drip machines for good reason. A high-quality drip brewer like a Fetco is going to result in a solid cup, but the quality goes through the roof when human attention is added to the equation. While methods like Kalita Wave and Hario V60 brewers are best for a single cup at a time, Chemex and French press can be used to batch up to 10 cups at a time and will keep coffee warm for close to an hour -- and your co-workers on your side.
Use filtered or distilled water
No matter your brew method, coffee is 99% water so the quality of your H20 makes a big difference. Even if your tap water tastes like mountain dew (not Mountain Dew), it's going to taint the flavor of the coffee. Luckily, that water cooler where you theoretically talk about last night's Big Bang Theory is filtered, and can do wonders even for your office coffee-maker.
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Dan Gentile is a staff writer at Thrillist. He hasn't worked in an office in six years. Follow him to his dirty kitchen tables and humble brags at @Dannosphere.