Apple Thoughts: Some Rules to Get The Most Out of Mail

"If you're overwhelmed by your e-mail, Mail's rules can help. Use these simple yet powerful tools to sift through your e-mail and apply changes to messages, filter messages into specific folders, forward them automatically, set off alarms, and more."

All good rules (using color, highlights, alarms, etc) and by using them you really can get control of your email inbox. You can also use the same things with Gmail. Just a reminder in case you find yourself spending way too much time dealing with email, there is help out there for you!