Update README.md

Author: baumanab

README.md

@@ -33,3 +33,7 @@ To help the reviewer examine your work, please save examples of the output from
 The `challenge_video.mp4` video is an extra (and optional) challenge for you if you want to test your pipeline under somewhat trickier conditions.  The `harder_challenge.mp4` video is another optional challenge and is brutal!
 
 If you're feeling ambitious (again, totally optional though), don't stop there!  We encourage you to go out and take video of your own, calibrate your camera and show us how you would implement this project from scratch!
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+## How to write a README
+A well written README file can enhance your project and portfolio.  Develop your abilities to create professional README files by completing [this free course](https://www.udacity.com/course/writing-readmes--ud777).
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