Think about what you post. Sharing provocative photos or intimate details online, even in private emails, can cause you problems later on. Even people you consider friends can use this info against you, especially if they become ex-friends.

Passwords are private. Don’t share your password, even with friends. It’s hard to imagine, but friendships change and you don’t want to be impersonated by anyone. Pick a password you can remember but no one else can guess. One trick: Create a sentence like “I graduated from King School in 15” for the password “IgfKSi15.”

Read between the lines.” It may be fun to check out new people for friendship or romance, but be aware that, while some people are nice, others act nice because they’re trying to get something. Flattering or supportive messages may be more about manipulation than friendship or romance.

Don’t talk about sex with strangers. Be cautious when communicating with people you don’t know in person, especially if the conversation starts to be about sex or physical details. Don’t lead them on – you don’t want to be the target of a predator’s grooming. If they persist, call your local police or contact CyberTipline.com.

Avoid in-person meetings. The only way someone can physically harm you is if you’re both in the same location, so – to be 100% safe – don’t meet them in person. If you really must get together with someone you “met” online, don’t go alone. Have the meeting in a public place, tell a parent or some other solid backup, and bring some friends along.

Be smart when using a smartphone. All the same tips apply with phones as with computers along with some extra precautions. Be careful who you give your number to and how you use GPS and other technologies that can pinpoint your physical location. Be sure to secure your phone with a PIN, password, fingerprint or facial recognition. And make sure you know how to log into the iCloud or Android Find my Device so you can remotely locate, ring or erase a lost or missing phone.

Don’t measure your own life based on what others post. People typically post happy photos and stories online and don’t usually share their boring or sad moments or unflattering photos. Don’t assume that others have better lives than you do, based on what they post.