Even if you hate everything about your job and the people you work with, you still must be professional. If you have a position already lined up, good for you! Make sure as soon as you’ve signed on the dotted line at the new position that you let your current employer know you will be leaving.
Talk to your immediate supervisor. Tell him or her in person as soon as possible. Be respectful. If you are lucky and are like me, then your supervisor will understand. I was able to explain that I have greatly enjoyed working with her and have learned a great deal during my time at the company. This new opportunity will offer me growth opportunities and the ability to use all of my skills. Just be truthful and honest (not cruel, you never know when you might need something from your previous employer). In this conversation, make sure you find out what the official process is for submitting your letter of resignation.
As for this letter of resignation, keep it short and simple. There are lots of examples online. Once you know what your company requires to be in the letter and who it should be address to, you’re set.
Reiterate in the conversation with your supervisor and any additional bosses that you will wrap up any current projects and do your best to help make the transition as smooth as possible.
Giving notice can be stressful, but as long you remain professional and honest you can maintain the good relationships you have worked hard to build.