The thank-you note you send after every interview joins your resume and cover letter to become the foundation for your file with every potential employer. Sending it is not optional; that said, you should choose strategically among the options you do have. Here’s a primer on the art of the thank-you note: who gets one, how they get it, and what it contains. But first, some basic information that applies to every thank-you note, every time. Every note must be unique. You can’t send the same thank-you note to more than one person – if there are multiple identical (or nearly identical) notes in your file, it will reflect poorly on you. Absolutely no typos of any kind. It’s unfortunate that we need to say that, but every month, an employer calls us and says, “You know, I really liked this student, but I have to tell you there was a huge typo in their resume, their cover letter, their thank-you note.” In a competitive world, that’s enough to undo you, even if you have a …