Backing Tracks - Sometimes playing the flute to a backtrack is not only fun, it helps build the rhythm. Tom Bailey has some of the best tracks on the internet. Check out this youtube playlist for the Native American Flute
Note about backing tracks - There are hundreds of backing tracks on youtube. Many of them will state the key they are composed in and if it is a major key, you may think you will not be able to play it on your flute. Every major key has a relative minor key. This circle of fifths will show you which flute to use. For example: You find a good track written in the key of C, move to the center of the circle and you will see the minor key of A. So you would play the Am flute to the Cmaj backtrack.
Learn to Play - The fastest and most fun way to learn to play the flute is to join a flute circle. The World Flute Society has the most comprehensive list of flute circles, and makers I have ever encountered.