What I actually Wrote:
Dear Mr. [My Boss’s Name]:
I am writing to announce my resignation from [The Company I Work For], effective two weeks from this date. My last day of employment with this company will be May 3, 2013.
This was not an easy decision to make, on my part. The past seven months have been very rewarding. I’ve enjoyed working for you and learning so much about many different aspects of business.
Thank you for the opportunities for growth that you have provided me.
I wish you and the company all the best.