What you eat influences your mind, and, some people think, your meditation. According to a recent pilot study, your diet also influences your mood. Two weeks on a lacto-vegetarian diet made participants in the study happier. Those who continued to eat meat and those who avoided meat but ate fish did not experience this change of mood.
On a recent visit to Oslo, Jon Kabat-Zinn spoke about mindfulness. Much of it was good and interesting. But doesn't his suggestive (and very digressive!) style sometimes resemble mood making more than mindfulness?