Audiobooks, audiofiles and podcasts are good listening practice. They are also ideal for "multi-tasking." You can listen to them when you are doing something else and your hands aren't free to to hold a book. But you can also use them to improve your reading skills. Find or print out a copy of the book or article to read along while you listen.
Free Audio Books
LibriVox is the king of free audio books. You can use the catalog to search through their library of nearly 1000 works, all part of the public domain. If you’re feeling generous, you can even contribute wiki-style by recording audio of your own.
AudioBooksForFree also has a big catalog to sort through, with an emphasis on classic works, but a decent amount of mystery, sci-fi, and thriller as well. The only catch here is that you’ll have to pay for quality: the lowest quality downloads are free but anything better than 8 Kbps costs $5-8.