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.
 
