These are some resources that you may find useful if you are interested in mindfulness or if you want to approach it for the first time.
Mindfulness: A practical guide to finding peace in a frantic world | Mark Williams
Radical Acceptance: Embracing your life with the heart of a Buddha | Tara Brach
The wise heart: A guide to the universal teachings of Buddhist psychology | Jack Kornfield
Wherever you go, there you are | Jon Kabat-Zinn
Full catastrophe living: Using the wisdom of your body and mind to face stress, pain and illness| Jon Kabat-Zinn
The happiness trap: Stop struggling, start living | Russ Harris
Palouse Mindfulness | Website to take a free MBSR course at your own pace - offered in several languages