How To Prevent Malware on Lion & Snow Leopard Macs
Use a non-admin account: Step 2
Ensure the new account is set to Standard, and fill out the rest of the form. If you click on the button with the key icon, you can use a password helper tool to generate a difficult password. When choosing a password hint remember that others, including laptop thieves, can see your hint. I recommend not using hints and just keeping a hard-copy list of your passwords in a safe place. If you must use hints, pick something that other people won't be able to guess. A good hint is "What's the name of my first pet?" A bad hint is "Where was I born?"
Make sure this password is different from your administrator account's password.