I can't recommend his "Mindfulness for Beginners" book enough. Although I've been "meditating" for years, this book is packed with subtleties that are easily missed. In other teachings, it can be very difficult to separate religious dogma ("all you need is love, man") to the things that actually make a difference, scientifically, to your practice ("bring gentleness and kindness to the process").

One line especially made me realise I'd missed something important for years: Be aware "as if your life depended on it". That's about it.