There is a mindfulness CD I provide free of charge to clients, upon request. In the CD, I provide a brief introduction of what mindfulness is. There are 8 other tracks on the CD going through 8 different ACT based mindfulness meditations.
There are also a number of other resources that are freely available to help you with mindfulness based practice.
A web quick search yielded the following resources:
MELBOURNE MINDFULNESS CENTRE
http://www.stillmind.com.au/mindfulnessandrelaxation.htm
AUSTRALIAN CANCER COUNCIL
MINDFUL MEDITATIONS BY UCLA
http://marc.ucla.edu/body.cfm?id=22
UC SAN DIEGO
http://health.ucsd.edu/specialties/mindfulness/mbsr/Pages/audio.aspx