Back in 2004, Gmail rewrote the rules for Web-based email. It had a fast, clean interface, and a jaw-dropping 1GB of free storage. Today, it comes with ten times the amount of space, and boasts many millions of users across the globe. But even if you use it every day, you're probably not making the most of the features it has to offer. With these tips, you can take your Gmail life beyond "power user." You can be an off-the-deep-end Gmail megalomaniac. Read the full story at Gizmodo.