Better Practice: To make your QR code faster to scan, particularly from a distance, try using a URL shortener before creating your QR codes. The generated code will contain less information and can be read more easily and reliably by a scanner.

Comparison of QR codes from a full or shortened URL.
The shortened code will be easier to scan at more distances, and can be made smaller in print without sacrificing ease of use, particularly when the precision of bulk printing equipment is low.

To create your own QR code, just type QR code generator into bing.

Check out more cheap tricks here.