Although designed to address security for webmail (email accessed through an internet browser like Internet Explorer, Firefox, or Chrome (specifically Gmail or Google Apps), the Gmail Security Checklist is worth a few of your minutes. Even if you don’t regularly use webmail at work, chances are you use it for a personal email account. The 18 point security review provides a quick review of some base-level measures we might take for granted (or might forget altogether).
It is also a reminder that updating your software (even your browser, plug-ins, extension, and third-party programs/tools) is a good idea and a valid measure to protect yourself, your data, and your network.