How do I write a good job application letter?

How should I write a letter to ask that my job application be reconsidered?

• I had an interview with a trailer manufacturing company on November 21st 2013 but wasn't selected for the position. The position was "Material Handler" which involves work on a forklift. About a month later I went to a Staffing Agency to try and get into the same place as a temp to hire put for a position in the painting dept. instead. I was told they weren't interested in meeting with again since I was already interviewed a month ago. I then called the Human Resource Manager to ask find out why. She said that the guy that interviewed me doesn't think I have enough qualifications to work there even though I have 3+ years of experience with operating forklifts. I told this to a guy that I know that works there and he recommends that I keep calling. Which I have been doing once a week to let the company know that I am still interested in a position with them. I have been thinking about reapplying to give them updated employment info along with a letter asking that I be reconsidered for a position there. What may have hurt me during the interview is that I wasn't very confident and didn't show enough enthusiasm and interest in the company or position. I would really like a job there but running out of ideas. They are constantly advertising in a couple of news papers and on their company website that they are hiring. Any suggestions on what to do?

• Answer:

  You "didn't show enough enthusiasm and interest in the company or the position". I hate to tell you this but those are the two WORST mistakes to ever make at a job interview. Forget trying to get a job there...it ain't happening. Learn from this mistake and move on.