Several online forums offer tips for managing email. For example, TechProse offers Managing Email, which gives suggestions for
- breaking the pattern of continuous interruption,
- organizing emails, and
- writing emails.
Merlin Mann of 43 Folders offers Five Fast Email Productivity Tips that will help you "take back your day" from the email barrage.
Finally, you can get lots more tips from the 13 brief articles listed and linked on Helium's Time Efficient Tips for Managing Your Email.