One of the advantages of the Android OS is its ability to multitask. We'll share an easy tip with you to quickly switch between your apps.
Press and hold the Home key of your Android phone. This will bring up a list of recently used apps. The number of recent apps may differ among phones, but the Motorola Droid X lists the last eight. You can bring up the recently used app list no matter where you are on your phone.
Tap on the app you want to launch, and away you go!