think of it as multi tasking. i hold the home button and view a web page, then hold it to go back to the email i was typing explaining what i read on the web page, then hold the button and go to my music app to go to the next song. multi tasking. do not use task killers. Android kills apps on its own, and is designed to do so. keeping apps in memory is not a bad thing. it helps them load faster. let Android do what it was designed to do. having a bunch of free memory not taken up by apps is worse on the system than having little free memory.