How to write Letters of Recommendation?

 Tip:  Avoid writing  weakness, try to write the shining part of the individual and conclusion should be positive.

1. Introduction:
Describe how you know the individual.
Example:

I have worked with Jiansen Lu at the University of British Columbia  from August 2008 to August 2009. We worked together in the software design team.

2. State your argument and answer the questions (for example what programing language  he is familiar with)

I feel that Jiansen Lu is highly qualified for the software developer position. He is proficient at C++, PHP/MySQL, JavaScript, PYTHON and MATLAB.

3. Evidence for your arguments
He is a key contributor to our project Content Management. He design the code using PHP/MySQL, test and release the code. He delivers high quality software products, meets or exceeds deadlines, and assists his co-workers at every opportunity. When we were under an especially strict timeline on a recent project, he worked a lot of overtime to ensure the client was pleased.
  
4. Conclusion:Finally summarize the positive arguments for recommending the candidate

Jiansen Lu is a trustworthy, reliable programmer, and I highly recommend her for the software position at your company. If you have any questions, feel free to contact me at 604-123-4567 or myemail at hotmail.com.

Sincerely,

David