We'll start by washing a potato under cold tap water. Then we'll fill a pot with water. It can be cold or hot water. Turn on the stove, place the pot on the burner, then put the potato inside the pot.
Putting a lid on the pot will make the water boil more quickly. Once that's boiling, you can reduce the temperature a little bit. You'll want to let it cook for between 10 and 20 minutes, depending on how thick your potato is. You can check it every now and then with a fork.
Once it's tender all...