Here are 3 mindfulness meditation exercises that are very effective and very simple. I suggest you do them in order. Practice each one at least a week before moving on to the next one. Do them throughout the day and evening during all sorts of activities. Experiment and explore. And enjoy.
If you would prefer a guided mindfulness meditation then I would recommend Meditation 1 or Meditation 2. You can download them in mp3 format at www.lightunlimitedpublishing.com.