To sharpen my listening skill I have been learning English for almost 4 years but now my English is not good enough for speaking fluently, listening well. I want to sharpen my four skills in parallel but I don't know well how to increase my listening skill. For speaking, I use the Skype messenger but I think that it can't help me well because there is not good speaker on the Skype. For listening, what kind of the sources should I use? and what kind of the ways should I use? when I am listening to.