Mindfulness is really the answer to a lot of problems in people's lives.
Most of us act according to automatic thoughts and behaviors, without even really paying attention to ourselves.
By living in the present and noticing thoughts and actions as they happen you can be more in control. You can think about whether or not your actions are sustainable or if your responses are sound. You can think about whether or not your thoughts are what you want them to be. You can even keep your feelings in check.
Meditation is a good way to practice coming into the present and quieting the mind. Focusing on a single picture or word in your mind while listening to yourself breathe for a few minutes every day.
With practice you can go throughout your day in control of yourself, not simply reacting automatically to whatever comes your way.
It is important that we are mindful if we want to be sustainable thinkers because old habits die hard. We need to be aware of what we are doing and what decisions we are making.
Constantly asking yourself, "Is this the best sustainable action I can take?" is a good way to keep on top of things.
Many times you might have to choose between good, better and best in regards to a sustainable decision. It is good to think through tough decisions (i.e. is it better to eat locally or organically if you can't do both?). These are the types of questions that can be considered when living your life in a mindful way.
As you realize that you do have control over your thoughts, feelings and behaviors you find a new freedom and can make great strides toward sustainable living.