Postage rate reductions include: First-class stamps â 47 cents (old rate, 49 cents) Each additional ounce for letters â 21 cents (old rate, 22 cents) First-class metered mail (first ounce) â 46.5 cents (old rate, 48.5 cents) Postcards â 34 cents (old rate, 35 cents) Certified mail â $3.30 (old rate, $3.45)
1 When baking more than one potato, choose potatoes that are the same size, so they finish baking at the same time.  Preheat the oven (see table below). You can bake your potatoes at different temperatures, ranging from 400 degrees Fahrenheit (204.4 degrees Celsius) to 325 degrees Fahrenheit (162.7 degrees Celsius).
1 Preheat oven to 350 degrees F (175 degrees C). 2  Scrub the potato and prick it with a fork to prevent steam from building up and causing the potato to explode in your oven. 3  Bake for 1 1/2 hours.