Adding to the post on using Outlook to manage your Gmail account here is a cool way to manage all your emails account, Gmail or not, from within Gmail.

I will show you how to configure Gmail to manage multiple accounts in a transparent way and using your own domain email address or any other you may like.

Link:
http://…/manage-all-your-email-accounts-with-gmail

Check out these posts too:

  1. Using Gmail as Your Universal Email Account
  2. All Gmail Users Are Given Two Separate Email Addresses
  3. Import Your Mail into GMail with Gmail Loader
  4. Make Gmail better
  5. Gmail Now Tells You Who You Want To Email
  6. Easy disposable email addresses with Gmail
  7. How to use Outlook as the interface to Gmail