Audio Resources - Podcasts and Sound files for Improving Japanese Listening - JLPT Listening Practice Tips

For improving listening skills, nothing but actual listening can help you!

1) Japanesepod101.com - you can find all sorts of podcasts for different levels here from JLPT N5 to N2, I'd say.
2) NHK Japanese lesssons -  Japanese with English explanations - good for JLPT N5 to N3.

3) Tanos.co.uk - audio vocabulary list for JLPT N5 and JLPT N4
4) From Tanos again, The Conversation Book: this one is for JLPT N3, but there's a complete set from JLPT N5 to N1.
5) Watching your favorite Japanese shows and videos is another fun way of learning. Try turning off the English captions, and turn on Japanese captions instead!