If you want to be safe you should think like a hacker.
First, a hacker will try to hack your passwords throw trojans, malwares or anything to gain access to your computer, so, you have to use a good antivirus and never download a file from an untrusted website.
Then, a hacker can pretend to be your friend to collect as much information as possible such as birth date or best friend name. Those information can be valuable when trying to reset your passwords.
Hacking a human mind is always easier than hacking a software.
This is very good suggestion, but dont you think all people can not do it? I mean i can not think like hacker because my bad.
I only not download anything from any source and i dont click link from any source because i type it.