The Garrison Institute offers a very basic step by step overview of how to practice mindful meditation:
Here are some links that offer some additional details:
Mindful Magazine offers a variety of article for someone who is new to meditation. Click here to explore topics such as myths about mindfulness, choosing a meditation instructor, and how mindfulness can help you deal with difficult emotions.
Psychology Today offers a detailed explanation and background of mindfulness, including how it is used in psychotherapy. Click here to learn more.
The Insight Meditation Center of Washington hosts an online guide to forming a mindfulness practice. Click here to read it.