First, don't click on links unless you're certain they are taking you to a legitimate video or link. If in doubt, don't click. Sometimes, I will message the friend and ask if it's a legitimate link but in general, I don't bite. Second, make your passwords for internet sites more difficult to hack.
According to an internet security expert, hackers use computer programs which go through the entire dictionary to find words in your passwords. He suggests that if you're going to use a word in your password, put a number in the middle of it. If you have a hard time remembering your password, use the same one everywhere, just change the first two letters. For example, use the first two letters of the website you are accessing (For example am5happ13y for Amazon.com, fa5happ13y for Facebook.com, eb5happ13y for ebay.com, etc.) Hackers also use personal information such as names, children's names, personal and family birthdates and anniversaries to try and crack your password so avoid using them when creating a password. This information can often be found in public records. Using symbols in the password, rather than numbers also improves password security.
You can do other things to protect yourself while surfing. Invest in a security program like McAfee or Norton. These programs remove many of the threats to your security and are well-worth the investment. In addition, I have a friend who has an e-mail account which she uses to access websites and receive online offers which is separate from her personal e-mail. My sister has an e-mail account solely for facebook notifications and correspondence. If you have any other ideas, please share them.