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
AUSTRALIAN CANCER COUNCIL
MINDFUL MEDITATIONS BY UCLA
UC SAN DIEGO