Depending how and where you use your Mac, you may like to login or logout automatically. Here’s how.
1Password can do many things, including generating passwords, but saving passwords and entering them for you is its most powerful feature.
Secure Empty Trash really gets rid of files in the Trash can.
Erase a drive to remove old files or delete confidential information.
If you want to be quite sure no-one can retrieve the information from an old floppy or other data store destroy it: physically.
Encrypt documents to keep confidential information away from prying eyes.