I went to Valencia last year and took a course there for a fortnight. I realised that I needed to listen more. So I got into listening to Coffee Break Spanish podcasts and then Showtime Spanish by the same people. I really recommend them. I follow umpteen Spanish YouTube sites such as Español Con Juan, Dreaming Spanish, Easy Spanish etc which I enjoy. My listening is now much improved than a year ago so much so that when I returned to Valencia this year I took another class for a week this time and was able to contribute much more to the Conversational Class. I love it. My tip is that you basically have to immerse yourself in Spanish and escuchar, escuchar, escuchar.