(Please note that this tip now only applies to those who haven't upgraded to iOS 8. The Raise to Speak feature has been replaced in iOS 8 with the Hey Siri feature.)
If you're not already using Siri, you need to start right now. Siri is awesome because it makes doing things like setting reminders and alarms, dictating calls and emails, calculating tips, and creating secure passwords quick, easy, and hands free.
You can make Siri even more convenient to use by using the Raise to Speak feature. Here's how: