It’s President Obama’s first day on his new job. Which makes Working Girl think of first-days-on-the-job in general. Your first day, and your first week, at any new job is super important because the impression people get of you then will last a long time. Truly. If you are late for work the first week on a job, you will forever after be thought of as the kind of person who is late for work. Even if you are on time every day for the next ten years. It’s kind of annoying really. But ea