This Instructable deals with the old adage: "If you are in a hurry, slow down".
Potatoes: They are as stubborn as any vegetable ever gets on the fire, and trying to hurry them up is nothing but an exercise in futility: in the gas range they'll just keep mooning you, and in the microwave you'll end up with a leathery pouch full of the most disgusting heat-dried flour.
Therefore, I'll explain the way I do them, which I adapted from my grandmother's own way on the gas range.
By the way, my grandmother would always say one thing about potatoes: if you have time to cook one, better cook three. In the gas range it wasn't so obvious, but its just a lot more obvious nowadays. My own rule-of-thumb is The time it takes to cook three potatoes is slightly less than twice what it takes to cook a single one, subtracting the time it takes for the water to come to the boiling point. this rule also applies to rice: I make a single cup in 17 minutes, but two in 25 and three in 32.
Anyway, all done, this instructable shouldn't take more than 20 minutes.