If you’re entering sensitive information, cover the screen with your hand

You can never be totally sure if someone’s looking at your screen, so it’s a good idea to make this a habit. Another solution is using a privacy screen for your laptop if you often use your laptop in a crowded place, such as airplanes and airports. Privacy screens make it difficult for people to decipher what’s shown on the computer unless they are looking at it from directly in front and at very close range.