A good way to improve your listening skill

http://www.esl-lab.com/story1/story1.htm i just listened to this conversation between police officer and man, he was went to the party and driving home, when he saw an UFO.

and This Level is Medium, I heard it once and i got 80% which is mean i only got 4 correct answer on the questions.

and i've tried the difficult level with just listening to it only once, and the conversation between a man and florist, the man forgot his anniv and wanted to buy roses for his wife but dont have much money hahhaha 

http://www.esl-lab.com/flowershop/flowershoprd1.htm and i only got 40% score, hahahha not really bad for beginner hehhe and i'll do my best next time :))