Being able to sign into Google Apps from multiple accounts is handy, but also creates a security risk. A new dashboard for Google Apps users tracks which devices have accessed your account.
From the Dashboard page, you can disable specific devices if you no longer use them, and take steps to secure your account if a device you don't recognise appears. (The tracking also works for basic Google accounts.)
Google has also introduced a security wizard for Google Apps users, which walks through basic steps such as two-factor authentication. Hit the link for more details from the announcement post.
New security tools to help improve online security [Google for Work Blog]