I just accepted a new job & immediately thereafter was offered another one that I know is more important to the start of my career. I cannot turn this down, despite that I just underwent a week of training & am desperately needed at my current company. I do not know my boss well enough, nor have I been there long enough, to worry about using him as a reference, but I do not want to leave them scrambling to find a new employee. The better job will start in two weeks. WHAT SHOULD I DO? Two week notice? Email resignation? Etc.