You can set notifications to find out when your collaborators have modified your spreadsheets, and learn what sheets or cells they've modified. You can also choose how often you'd like to be notified.
If you dont't want that every time you take a picture with your Android device, it gets instantly uploaded to your Google+ profile, this tutorial's for you.
Let me show you how to set up a Wi-Fi hotspot on Nokia Lumia 920 and other Windows Phone 8 devices so you can share the Internet to other Wi-Fi enabled devices.