You can use voice recognition either on smartphone or desktop computer.
On Galaxy Note, you to dictate with voice. If you use it with google docs, your work efficiency will increase. Here is a video on how to do it. It shows how to recognize English.
You can use voice recognition feature on a desk-top computer using http://talktyper.com service. You should use Google Chrome. Here is a video of how you can do it. The recognition rate is amazing both for English and Korean.