Preheat oven to 425°F (220°C)
Scrub potatoes clean and pat dry
Prick potatoes all over with a fork
Rub skins with olive oil (optional)
Sprinkle with salt (optional)
Place potatoes directly on the oven rack or on a baking sheet
Bake for 45–60 minutes, depending on size, until tender when pierced with a knife
Remove from oven and let rest 5–10 minutes
Slice lengthwise and fluff the inside with a fork
Add desired toppings (butter, sour cream, cheese, chives, bacon, salt, pepper)