Preheat your oven so your food will be ready faster. Before you bake something, your oven needs to be heated to the proper temperature. While it takes only a few seconds to turn on your oven, it can take several minutes for it to reach the right temperature. This is why it’s often best to turn the oven on during the beginning or middle of the cooking process, instead of waiting until the end.
Rearrange the shelf levels. Put the oven shelves into the position that you need them to be in for the cooking before the oven gets hot.
Check the preheat level required by your recipe. Turn on the oven and set it to the correct temperature.