The simulator for running iOS apps during development is a big time saver when you do not have a device to hand. What is an even bigger time saver is knowing the keyboard shortcuts to get around it quicker. Here are the top five that you should know.
Rotate the device to the left
Command + Left Arrow
Rotate the device to the right
Command + Right Arrow
Go to the home screen
Command + Shift + H
Increase Volume
Command + Up Arrow
Decrease Volume
Command + Down Arrow
I use these five keyboard shortcuts all the time, especially the device rotation for testing layouts and transitions.