I’m no Emily Post, but I am a stickler for thank you notes—the kind of mother who keeps a detailed list of who-gave-what at my kids’ birthday parties and then makes them write thank you cards within the week. I want my kids to learn the art of showing appreciation, not just because it’s the right thing to do, but also because it’s a lifelong skill. Related: What To Say In A Thank You Card Besides ‘Thank You’ The same etiquette applies in your career. 'Thank yous' play a dual role of gratitude and strategy: You show your appreciation, and in return you further a relationship. In today’s connected economy, relationship building is paramount whether you are in the middle of a job search, or trying to advance your career. And people are more likely to help others who show an appreciation for their help. This doesn’t have to be a daunting task. No one is expecting a beautifully handwritten note on 100 pound paper. In today’s fast moving world where everything seems time sensitive, sending an email is not only more practical but also appreciated just the same. Here are five opportunities where you should be following up with a sincere thank you email: