It's very simple to make a QR code..simply go to any QR code generator websites like qrstuff.com and  etc...,click here for creating a QR code.

QR Code

Steps :-

1.  Go to http://www.qrstuff.com

2. Select any data type
eg:-
Website URL
YouTube Video
Google Maps Location
Twitter
Facebook and etc....,

3. Type the contents.

4. Select the color

5. Take the output any in the following forms 
      a. Download
      b. Print

      c. E-mail

Video Tutorial :-