Three websites packed with listening comprehension excercises. Real English is also great if you want to practice your pronunciation or work on your fluency.

Mansión del inglés

http://www.mansioningles.com/listening00.htm

Real English

https://www.youtube.com/watch?v=5_Kqug55Si0
https://www.youtube.com/watch?v=7JA1y2Q7ZEQ
https://www.youtube.com/watch?v=B6wZ26a3oXw

http://www.youtube.com/watch?v=5ocKRq323sk
http://www.youtube.com/watch?v=pJ9ffd8C1JU
https://www.youtube.com/watch?v=wL3CFtW8WE0

Randall's cyber listening lab

http://www.esl-lab.com/