You would think that baking a potato is a simple process and it can be but there are various ways to bake a potato if you start looking or asking people. I am going to show you how I learned working in a restaurant and I will say they turn out wonderful.
Lay out all of your ingredients, which for this is potatoes, olive oil, kosher salt, aluminum foil, pastry brush, and a fork or knife. Scrub your potatoes and get all the dirt off of them. Then poke holes throughout each potato with the knife or fork.
Then put directly on the oven rack in the oven. Bake for 1 - 2 hours. I will say I use a higher temperature so that they are ready quicker but if you have more time, you can use a lower temperature and they will be great too.