You got the job! Your future looks bright. Anticipation is high.
There's only one thing standing in your way...
Whether you are remaining in your current industry or switching fields, it is important to leave your current job with grace. The manner and timing in which you give notice is the most important part of leaving on a good note.
1. Show deference. Even at the end of your time there, office politics are important. If possible, tell everyone of significance in person and on the same day. To prepare, start by making a list of each person you plan to notify. This list should include your department head, your manager, your mentors and your close work friends. Office structures can vary, so at a basic level you want to tell your company leadership and people with whom you have a close relationship before they hear it through gossip.
2. Make an appointment. No one likes an ambush. Schedule an appointment with each person on your notice list. This can either be formally through their assistant or informally over email.
3. Get to the point. Be polite, but don't waste time. Start with the fact that you have decided to leave the company. Be clear and concise. Do not show signs of indecisiveness as a way to lessen the blow.