If you're floundering in multiple e-mail accounts and just want to use one account for all, then Mail Forward may be able to help you.

The simple application can forward forward mail from AOL, Gmail, Hotmail, MSN, Netscape, and Yahoo web mail accounts to any email address. Not only that, but it can also forward mail from standard standard POP e-mail accounts such as in Outlook or Outlook Express. You can choose, when you delete mail, whether you want it deleting from both accounts or just one of them. The original mailbox address will be used as the return address for the forwarded mail, so if the mail is undeliverable it will be returned to the original account. A nice feature, especially if you send out newsletters regularly or a habitual group e-mail, is the option to use a built-in scheduler that allows you to forward mail at a specified time. If you've got any scripting skills, you can also use scripts to forward e-mail at periodic intervals. This latest version includes support for forwarding mail from alternate, international, and custom domains which means those such as live.com, yahoo.co.uk etc.

A simple solution to your mail, forwarding needs although don't expect it to forward everything instantly.