
Apple iPhone
Closing Apps (Actually quitting them)
I learned today if you hold on to the home button for 10 seconds, it actually closes and quits the app to free up memory. So if you are in Safari and hold the home button, it will kill safari until the next time you use it.
I do this for the iPod function. Works great and phone is a lot more responsive (not that it crashes but more responsive with more available memory).