As a follow up to my last post on the discipline of prayer, I recommend taking advantage of the free book of the month from christianaudio.com called "Spiritual Disciplines for the Christian Life" by Donald Whitney.
Here is the link to the free audio book. You will have to register with audiobooks (which is free) and you need to enter the coupon code to get the book for free (MAR2009).
The disciplines Whitney writes about are:
* Bible intake
* Silence and solitude