Not using room temperature eggs when you're frying them

Why should the temperature of eggs before cooking matter? After all, they'll be fried in a frying pan, right? While fresh-from-the-fridge eggs may produce an adequate scramble, allowing them to sit out and reach room temperature will prevent them from steaming when frying. That being said, if you pour a little water into the pan while making sunny-side-up eggs and then cover the pan, the tops will cook while the yolk will remain runny.

If the eggs are not cooked at room temperature, a cold egg may take longer to fully cook. This is because the egg white will struggle to leave its runny stage, potentially overcooking the yolk (via The Guardian). Overcooked eggs are one of the worst breakfast mistakes you can make, especially if you enjoy dipping your bread or potatoes into a perfectly-made egg center.