Jon Kabat-Zinn has bridged the gap between the meditation practices of Buddhism and the western, science-based treatment of mental suffering.
In the first two years of my own practice, I followed guided meditations from Jon Kabat-Zinn. This laid a foundation of mindfulness for understanding many other meditations.
The audio guided meditations that come with Mindfulness for Beginners are a perfect way to start meditating. The book itself contains short chapters that help to deepen a practice once it has started to take root.