Quitting your job sounds like it should be easy. As long as you don't flip over a table, Housewives-style, or call anyone any names, you're golden, right?
In all seriousness, there is a science and an art to quitting in a way that won't haunt you down the road. Most industries are like living a small town: mess up with one person, and it's liable to get around. The key is to do your prep work ahead of time, so that you can exit as elegantly as possible.