IPHONE: Saving data on exit

Totatlly forgot how to do this, so I had to look it up...

Use the following methods to catch application exit notifications:
- (void)applicationWillTerminate:(UIApplication *)application

Use this method to catch application interrupt notification:
- (void)applicationWillResignActive:(UIApplication *)application

Use this method to catch application resume notification:
- (void)applicationDidBecomeActive:(UIApplication *)application