If you use a smart phone (Android, BlackBerry, iPhone, Windows Mobile), tablet (iPad, Android), or other mobile device, consider taking some or all of the following precautions:
Avoid storing confidential or otherwise sensitive information on a mobile device
This includes passwords, bank account or credit card numbers, etc.. Confidential information is more likely to be lost or stolen than a computer. If you do choose to store such information on your device, make sure you use an application that encrypts the information, and choose a strong password.
Set a PIN, password, or security pattern on the device
Configure the device to require the password to be entered after a certain period of inactivity (e.g., 5 minutes). Some devices also offer a feature that will erase the information on the device if someone makes repeated attempts to unlock it using the wrong password, but if you choose to enable this feature, make sure you have backups!