tap the "..." button. Navigate to Settings, Labs, and check Pre-cache map area. You can now download sections of Google Maps (one 10-mile radius at a time) by tapping an area on the map, waiting until an address loads, tapping the arrow, scrolling to the bottom of the screen, and tapping the "Pre-cache map area" option. These downloads take a few minutes, but they're worth it if you know you'll be offline. Make sure to download them over a Wi-Fi connection to minimize your data usage. You can also use third-party map applications, such as the free MapDroyd . MapDroyd lets you pick and choose which maps to download, and uses the OpenStreetMap framework. 7. Don't Stream Streaming music and movies from services such as Netflix, Hulu, Pandora, and Spotify is a huge data drain. According to PCWorld's tests , watching YouTube videos for just 10 minutes per day can easily push you past 1GB in a month, while listening to Pandora for 1 hour per day uses about 1.76GB of data in a month. The obvious solution is to stop streaming media over your cellular data connection. You'll probably want to give up watching Netflix and Hulu over your data connection altogether--but if you happen to be a big Netflix or Hulu watcher and you don't have reliable access to Wi-Fi, you may want to consider upping your data cap. If you can't live without your favorite YouTube videos, you can download the free TubeMate app , which allows