Two Weeks Notice
It is normal to feel uncomfortable about turning in your notice. Completing this task is another step on your career path. Once it is behind you, you can focus on your career goals and your next opportunity.
Giving your current employer two weeks notice is appropriate in most cases. If your project ends in three weeks, it would be appropriate to complete the work effort before moving on. Giving less than two weeks notice is disrespectful and may reflect poorly on you in the future, unless your current employer is agreeable with an earlier separation date.
When writing your resignation letter, keep it short and to the point. Address it to your immediate supervisor. Date the letter and state that effective immediately you are giving two weeks notice. Your last day of work will be two weeks from the date of the letter. Including a note of appreciation for the opportunity to work for your current employer may be appropriate. The details of your separation will be worked out in a different venue.
Once you have given your notice, it is important that you ask your current supervisor for a reference. Get their personal contact information so that you can reach them regardless of their own future employment choices. You should also provide your own current contact information in case there are any loose ends or questions that arise after your departure.