How do you forward all incoming mails on other accounts into one inbox?

Im trying to figure this out because I get tired of opening different email inboxes but im wanting all incoming mail to come to my personal folders.. i guess if thats what its called but is it possible so i dont have to open separate inboxes?

I use Gmail and either automatically forward my email to my gmail account or have Gmail configured to check my accounts with a pop3 connection.

If you get your email centralized to a single account such as Gmail that supports pop3 I believe your problem with MS Outlook access to 1 inbox will be solved.

-Raymond