Landing a job takes more than just nailing the interview. While your grandparents may tell you that a handwritten note is proper business decorum, a great email will do the trick in the 21st century. In fact, an essential part of the job application process today is the follow-up email.
Rubin told CNBC Make It (over email, of course), "The key with the follow-up message is to include something the person said in the conversation that stood out to you. That way, it proves you listened and makes the message stronger than a basic 'Thanks again!'"