I believe it is best to exercise on an empty stomach, especially for yoga. You can focus on your asanas because your stomach is not working on digesting food. If you really must have something drink coconut water like chefraw suggested. It is loaded with electrolytes and will keep you hydrated during your yoga session.
I am looking for free meditations online, either streaming video/audio or something that I can download. I am looking for both guided meditations and meditation music. My areas of interest are chakras, energy balancing, white light energy and mantras, specifically the OM used in ancient meditations.
I have one prepared by a local man. He coughs every now in the CD. I'll need to pull it out and play it. I agree. I is nice to have a little guidance or sharing when praying or meditating. A local yoga studio might sell some or know where is the best place to get them.