Not a single person from my known audience drinks coffee. Some may even doubt it has any healthy qualities. So this is mostly because I think it's cool.
Key 1: Freshly ground coffee is best. I don't have a grinder - I don't feel like buying a pricey one, the reviews for cheap ones aren't that great, they sound sort of messy and I don't need another gadget in the kitchen. Instead, I buy mine from the supermarket and use their grinder. Be sure to run the grinder first and lift the flap because there are loads of inconsiderate people that leave beans in there - and you want the kind you picked, not some weirdo mix from what the last guy wanted! Grind as much as will last you til your next trip on a setting around auto drip to use my favorite method (try it and see how it goes - I find espresso grind doesn't taste as good for this.)
Key 2: Melitta one-cup cone filter holder. I love it. If you don't know what it is, I put a pic below. You can easily make a nice 6-16 ounce cup from this. It's $3 for the cone, and filters are cheap, too. You put the filter into the cone, your coffee (2 Tbs/8 oz cup) into the filter, and pour in water that was brought to a boil and then allowed to cool for 15-30 seconds (I use an electric kettle). Fill it up all the way once for a small cup, or refill with water for a larger cup. Super quick, super good, and SOOO much better than instant! If I want a cheap mocha, I just put hot cocoa mix into the cup and let the coffee mix in as it drips from the filter.