Safe computing practices include a combination of how you technically protect your computer by using software, your security settings, and the physical actions you take. Everything you do makes a difference!
If you consistently use strong passwords, but then leave your computer unlocked and unattended in public places, your data is at risk.
If you use antivirus software but aren't careful about replying to or forwarding suspicious looking emails, you risk compromising your own devices and others.
If you download software and media from unknown sources, including torrent sites, you risk the security of your computer and information.