Matt Cutts, an engineer at Google, asked his blog readers for tips on how to improve Gmail—and he then compiled his responses on how to maximize your Gmail experience. If you want to only read unread email in your inbox, you can perform a search for label:unread label:inbox. If you're looking to compile an email but want to compose your message in a new window, hit the "C" button (whereas lowercase "c" allows you to compile the email without opening a new window). Have your own Gmail tips? Let's hear them in the comments.
11 Power Tips for Gmail [Matt Cutts]