You can also use third-party map applications, such as the free . MapDroyd lets you pick and choose which maps to download, and uses the framework.

Streaming music and movies from services such as Netflix, Hulu, Pandora, and Spotify is a huge data drain. , 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 , which allows you to download videos from YouTube and watch them on the go. Remember to do this over a Wi-Fi connection!