This one's not really a "tip" per se – it certainly won't make you more productive – but it's a fun easter egg hidden inside Ice Cream Sandwich. If you've got an ICS phone, head into Settings and click "About phone" at the bottom of the list. On the next page, start tapping the "Android version" button (you have to do five or six very quick taps). You'll see the familiar Android robot wearing an ice cream sandwich getup. Press and hold, and it'll explode, releasing tiny flying clones across your screen. Useful? Nah. Endearing? Absolutely!