Gmail creator: If your product is Great, it doesn't need to be Good.

What’s the right approach to new products? Pick three key attributes or features, get those things very, very right, and then forget about everything else. Those three attributes define the fundamental essence and value of the product — the rest is noise. For example, the original iPod was: 1) small enough to fit in your pocket, 2) had enough storage to hold many hours of music and 3) easy to sync with your Mac (most hardware companies can’t make software, so I bet the others got this wrong). That’s it — no wireless, no ability to edit playlists on the device, no support for Ogg — nothing but the essentials, well executed.
(Link: Gmail creator: If your product is Great, it doesn’t need to be Good.)