So you need to send a text, email, or take a note but you don't feel like typing it out. Just use the Voice Diction feature.
First, go into the feature that you want to use. If you want to send a text message, go into messaging. If you want to send an email, go into email, and it you want to take a note, go into the notepad.
Then, hold down the Voice Commands Key while you are speaking into the phone. When you are done, just release the Voice Commands Key.