Update your software frequently. There are new types of viruses coming out every day and if your anti-virus program might not catch them if it's too old.
Always be careful, even if you have an anti-virus software. It is common for some programs to miss Trojan horses so you watch out for suspicious files.
Backup your computer regularly. This is a good habit to get into in case any fatal errors occur.
Be aware of everything you download. This task might seem mundane but it's one of the most important steps you can take.
Scan any new files you may download. You can perform a virus scan with your anti-virus software as an extra protection measure.
Use more than one password.
Use (not-so) random characters.
Never talk to anyone online that you don't know.
Tell your parents if anyone ever asks to meet you somewhere.
Keep pictures of yourself off the internet unless it's ok with your parents.
Be respectful of other people on the internet and never say anything mean.
It's on there forever and can be used to trace back to you at any time.
Keep track of who you interact with on the internet.
Some people may not be who they seem to be.
Know that privacy is just an illusion.
Even personal information on social networks can be easily recovered by anyone.
Don't open any links in emails or chat rooms that look suspicious or unfamiliar.
Length is important.
Use the SUPR test.(strong/unique/practical/recent)
Be careful about what you put on the web.
Always ask for your parents' permission before going online.
Don't let anyone know your name, phone number, address, or any other personal information.
If you find yourself on a website that you don't think you should be on, you should exit the page.