French-language radio is a great source of authentic listening practice. Listening to the news and talk shows provides exposure to French as it's really (and quickly!) spoken, and even listening to music can be an excellent way to improve your aural comprehension.
How to access French radio
If you're in France, just turn on your radio and choose a station. If not, many stations offer streaming - here are some to consider.
RFI - Radio France International offers news and music from all over the world. They also have a number of features aimed at learners, including the particularly useful Journal en français facile: a 10-minute news summary every day at 8pm GMT and streamable any time after that.
Europe1 covers news from France, Europe, and the world.
France Culture is a great source of fascinating info about French, francophone, and world culture.
France Info offers news, history, culture, and more.
France Inter provides news and features on a wide variety of topics.
Mouv' offers music and "young persons' programming."
You can find hundreds more French radio stations, including lots of music and regional stations as well as stations from other countries at listenlive.eu.