Gmail again revealed a new feature called "Personal Level Indicators" which will help you to prioritize your gmails. When you enable this option, it put arrows next to messages in your inbox so you can tell if an email was addressed to you, a group, or a mailing list that you're on.
To enable this option
Click on Settings located at upper right corner. In General tab find Personal Level Indicators option then select it to Show Indicators and click on Save Changes.
You will see little arrows next to your emails.
A single arrow ("›") is automatically placed next to emails sent to you and others, and double arrows ("»") next to emails that are sent just to you. No arrow indicates this email is from mailing lists.
Give it a Try, I found this very useful.
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It would be nice if the indicators actually worked. When I save my changes to the indicator to show it, it doesn't show and when I go back into settings, it is again set to no show them.
My Indicators is a powerful, personal and social scorecard application for individuals and organizations to help score success in all aspects of daily life.
http://myindicators.com/