Learn some polite expressions so that you can sound more like a native speaker.
These will be especially useful if you work in customer services or a call centre and need to express yourself politely in English.
Las notas del episodio y más podcasts para mejorar tu ingles están en: http://www.inglespodcast.com/
Shownotes and more podcasts to improve your English at: http://www.inglespodcast.com/