In a word, don't. Yes, it's possible to creates lists of tasks or do GTD with Evernote, but you have to do it inside of documents. You risk losing your tasks somewhere in all the files and notes. In order to make sure you haven't missed anything, you have to check every document every day. That's too much work.
Estoy de acuerdo con este coach: Evernote una buena opción para gestionar el material de referencia, pero no sirve como gestor de tareas.