If you’re jailbroken you most likely have the tweak Activator, but if not, I strongly recommend that you go get it from Cydia. Essentially, this must-have iOS modification allows you to pick between a multitude of device actions and make them trigger just as many different shortcuts and settings. For instance, you can tell the device to start playing music if you triple-click the home button.
There are many obvious uses for this tweak, but there are also some interesting ones that are lesser known. For example, you can set any action to bring up a modal “Compose Text” interface that will let you easily create a text message from anywhere. To do so, open Activator in Settings, choose where you want the action to occur, choose the action, and select “Compose Text.” Try it out!